Skip to main content

Lozenge Diamond

to
15
100
73
41
39
26
137
20
20
8
7
1
17
78
53
2
4
11
6
4
5
6
3
1
1
96
53
4
18
9
9
8
7
to
6
4
3
2
2
32
19
15
13
4
3
2
2
1
1
152
1
96
46
Sort By
18k White Gold Natural Diamond and Ruby Ring
Located in New York, NY
a stunning ruby of 1.09 carats, and the other end showcasing a lozenge diamond. The total diamond
Category

21st Century and Contemporary Modern Fashion Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Lozenge Cut Champaign Color Diamond Ring
Located in Bangkok, TH
Very edgy and uniquely rare lozenge cut diamond in light Champaign color. Very modern and lends a
Category

2010s Thai Art Deco Cocktail Rings

Materials

Diamond, 18k Gold

Loose Diamond - Lozenge 4.51ct GIA J SI2 Solitaire
Located in Greensboro, NC
Carat: 4.51ct Cut: Lozenge Color: J Clarity: SI2 Certified by: GIA Report Number: 2225721834
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond

Hancocks- 2.74ct Lozenge Shaped Emerald Ring Kite Diamond Shoulders
By Hancocks
Located in London, GB
A beautiful lozenge-shape emerald and diamond ring by Hancocks, centred with a step-cut lozenge
Category

21st Century and Contemporary British Engagement Rings

Materials

Diamond, Emerald, 22k Gold

Estate 18K Lozenge Sapphire Diamond Wide Band Ring 4.60ctw
Located in Winter Springs, FL
cut lozenge shape bright blue natural sapphires and .60ctw in round diamonds ranging G-H color and
Category

21st Century and Contemporary Contemporary Band Rings

Materials

Diamond, Sapphire, Blue Sapphire, 18k Gold, Yellow Gold

18K Gold GIA Certified 2.02ct Lozenge-Cut Diamond Ring
Located in New York, NY
Showcasing a striking design, this ring features a uniquely cut diamond set in a sleek gold band
Category

21st Century and Contemporary Modern Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold

Antique Diamond Ring RedYellow Gold Lozenge Shape Cluster Ring
Located in Munich, Bavaria
head is set with 12 round old cut diamonds. The beautiful ring gallery has been executed in pierced
Category

Antique 1880s American Victorian Cluster Rings

Materials

Diamond, Gold, 14k Gold, 18k Gold

Emilio Jewelry Gia Certified 6.21 Carat Lozenge Kite Diamond Earring
By Emilio!
Located in New York, NY
!  Featuring 2 Lozenge cut diamonds 3.20ct tw D-Vs2 and 2 Kite diamonds totaling 3.01ct D-Vs1-Vs2 This piece is
Category

21st Century and Contemporary Drop Earrings

Materials

Diamond

Antique Victorian Rose Diamond 15 karat Rose Gold Ring Lozenge
Located in Munich, Bavaria
This charming lozenge shaped ring has been set with old cut diamonds coming from old Indian mines
Category

Antique Late 19th Century English Victorian Bridal Rings

Materials

Diamond

GIA Certified 1.08 Carat Lozenge-Cut Fancy Brown-Yellow Diamond Ring
By Gad & Co.
Located in Miami, FL
1.08 Carat lozenge-cut Diamond was determined by GIA to be of "Fancy Brown-Yellow" Color and "VS2
Category

21st Century and Contemporary Modern Cocktail Rings

Materials

Yellow Diamond, Diamond, Gold, Yellow Gold, White Gold, 18k Gold

Antique Diamond & Natural Pearl Lozenge Pendant Attributed to Giuliano ca. 1880
Located in London, GB
An antique natural pearl and diamond pendant attributed to Carlo Giuliano, circa 1880. The pendant
Category

Antique Late 19th Century English Pendant Necklaces

Materials

White Diamond, Oriental Pearl, 18k Gold

Art Deco 1920s 18K Yellow Gold & Platinum Lozenge Shaped Diamond Ring
Located in Staines-Upon-Thames, GB
Art Deco ring has a lozenge shaped head, set with one old mine cut diamond to the centre, surrounded
Category

Vintage 1920s British Art Deco Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

Antique Art Nouveau lozenge ring, Sapphire, Diamond and pearl, 18k gold
Located in NEWARK, GB
A truly stunning Art Nouveau era Sapphire, diamond and Pearl lozenge ring, this beauty has
Category

Early 20th Century British Art Nouveau Cocktail Rings

Materials

Sapphire, Pearl, Diamond, Yellow Gold, 18k Gold

3.1ct Rhombus Lozenge Brilliant Cut Diamond Solitaire Engagement Ring White Gold
Located in Lisbon, PT
smaller stones together, such as two trilliant-cut diamonds, to create the same final rhombus, lozenge or
Category

2010s Portuguese Contemporary Engagement Rings

Materials

Diamond, Gold, 18k Gold, White Gold

EXTREMELY RARE! GIA Certified 2.02 Carat Lozenge Kite Step cut Antique Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC57128 Stone Shape: MODIFIED LOZENGE STEP CUT Diamond Weight: 2.02 CT
Category

21st Century and Contemporary North American Art Deco Loose Gemstones

Materials

White Diamond, Diamond

18k White Gold 1ctw Black & White Diamond Flared Lozenge Shape Drop Earrings
Located in Montclair, NJ
--Stone(s):-- (50) Natural Genuine Diamonds - Round Brilliant Cut - Prong Set - Black Color
Category

21st Century and Contemporary Drop Earrings

Materials

Diamond, Black Diamond, Gold, 18k Gold, White Gold

Emilio Jewelry Gia Certified .90 Carat Each Lozenge Cut Diamond Bracelet Layout
By Emilio!
Located in New York, NY
Please inquire for a video. Shape :  LOZENGE CUT CORNER Avg Size :  0.90 Color :  D-G Clarity
Category

21st Century and Contemporary Tennis Bracelets

Materials

Diamond

3.0ct Antique Lozenge Shape Victorian Cut Diamond Cluster Ring in 18ct Gold
Located in London, GB
3.0ct Antique Lozenge Shape Victorian Cut Diamond Cluster Ring, Set In 18ct Gold This beautiful
Category

20th Century British Cluster Rings

Materials

Diamond, Gold, Yellow Gold, 18k Gold

Antique Edwardian 18K Yellow Gold & Platinum Old Cut Diamond Lozenge Shape Ring
Located in Montclair, NJ
--Stone(s):-- (13) Natural Genuine Diamonds - Old Single & Old Round Cut - Pave Set Material: 18k
Category

Antique Early 1900s Edwardian Cocktail Rings

Materials

Diamond, Yellow Gold, Platinum

Vintage 14k White Gold Lozenge Shape Black Onyx & Diamond Open Work Ring
Located in Montclair, NJ
–Stone(s)– (1) Natural Genuine Diamond - Old Transitional Cut - Pave Set - H Color - VS2 Clarity
Category

Mid-20th Century Art Deco Cocktail Rings

Materials

Diamond, Onyx, Gold, 14k Gold, White Gold

Art Deco 18K Yellow Gold and Platinum Diamond and Ruby Lozenge Shaped Ring
Located in Staines-Upon-Thames, GB
An Art Deco diamond, ruby, platinum and yellow gold ring, comprising two old cut diamonds, two rose
Category

Vintage 1920s Art Deco Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold, Platinum

Leto Lama Ocean Inspired Lozenge Abstract Art Ring Sapphires Diamonds 18 Ct Gold
Located in London, GB
ring 18 Ct Yellow Gold 1.6 Cts of Sapphires 0.330 Cts Aquamarine Oval 0.008 Cts White Diamonds Total
Category

21st Century and Contemporary British Artisan Cocktail Rings

Materials

Aquamarine, Diamond, Blue Sapphire, Green Sapphire, 18k Gold

Georgian Rococo Diamond Ring Circa 1740-1760
Located in Firenze, IT
A mid-18th century Rococo diamond ring circa 1740-1760, the center with a lozenge cluster rose
Category

Antique 1740s English Engagement Rings

Materials

Diamond, Gold, 18k Gold, Silver

Diamond 14k White Gold Link Bracelet 7.25" Long
Located in Los Angeles, CA
composed of square lozenged shaped diamond links alternating with half tubular ribbed link sections. The
Category

21st Century and Contemporary Contemporary Link Bracelets

Materials

Diamond, White Gold, 14k Gold

House of Tabbah Coral and Diamond Gold Necklace
By Tabbah
Located in New York, NY
House of Tabbah necklace in 18k gold with 47 carats of diamonds and coral lozenges. Made in Paris
Category

Vintage 1960s Choker Necklaces

Materials

Coral, Diamond, Gold, 18k Gold

Sapphire and Diamond Platinum Necklace by J. Roca
Located in New York, NY
-cut diamond openwork lozenges. The diamonds weigh approximately 33.75 carats total, signed J. Roca
Category

Mid-20th Century Spanish Link Necklaces

Materials

Blue Sapphire, Diamond, Platinum

Natural Diamond Drop Earrings 1.50 cttw in 18k Yellow Gold
Located in La Jolla, CA
sections of Natural Round Brilliant Diamonds in a lozenge shape, all set in 18k Yellow Gold. The earrings
Category

20th Century North American Drop Earrings

Materials

Diamond, 18k Gold, Yellow Gold

Natural GIA Certified 2.02 Carat Fancy Yellow Diamond Heart Platinum Necklace
By Gad & Co.
Located in Miami, FL
-cut diamonds totaling 0.75 carats and 50 round-cut white diamonds. The pendant also features a lozenge
Category

21st Century and Contemporary North American Contemporary Pendant Necklaces

Materials

White Diamond, Yellow Diamond, Platinum

English Diamond Enameled 18k Gold Harlequin Ring, circa 1890
Located in St. Catharines, ON
graduated rose diamonds, set in lozenge-shaped bezels, mounted in 18k yellow gold. English, circa 1890
Category

Antique 1890s British Victorian Band Rings

Materials

Diamond, Yellow Gold, 18k Gold, Enamel

GIA Certified 2.38 Carat Marquis-Cut "H" Color "Si1" Clarity Diamond Ring
By Gad & Co.
Located in Miami, FL
carats in lozenge-cut diamonds. This GIA-certified natural diamond ring is unlike any other Marquise cut
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, White Diamond, 18k Gold, White Gold

Marcus Natural Pearl Diamond and Platinum Necklace, Circa 1920
By Marcus & Co.
Located in London, GB
motif, with three diamonds in a lozenge, atop a five row splash of pavé set diamonds, topped with a
Category

Vintage 1920s American Belle Époque Drop Necklaces

Materials

Diamond, Pearl, Natural Pearl, Platinum

Roman Malakov 2.30 Carats Colombian Emerald and Diamond Halo Dangle Earrings
By Roman Malakov
Located in New York, NY
encrusted lever-back spaced by a beautiful lozenge cut diamond. The diamonds weigh 0.93 carats total
Category

21st Century and Contemporary American Contemporary Dangle Earrings

Materials

Diamond, Emerald, Platinum

Vintage 2.10 Carat Sapphire and 2.42 Carat Diamond Palladium Jewellery Set
Located in Jesmond, Newcastle Upon Tyne
example of sapphire and diamond jewellery/estate jewelry. Sapphire Quality Colour Blue Cut Lozenge
Category

Vintage 1930s Unknown Cluster Rings

Materials

Diamond, Sapphire, Palladium

GIA Certified 5.78 Carat Fancy Color Shield Cut Diamond Pendant Necklace
By Gad & Co.
Located in Miami, FL
Certified #2196995292 Side Stone Details: - 1 Lozenge cut white diamond, 0.15 CTTW - 76 Round cut white
Category

21st Century and Contemporary Art Deco Pendant Necklaces

Materials

Diamond, Brown Diamond, Gold, 18k Gold, Rose Gold, White Gold

Gregg Ruth Yellow and White Diamond Station Drop Necklace Two-Tone 18 Karat Gold
By Gregg Ruth
Located in Scottsdale, AZ
white gold settings. The exquisite vertical diamond drop at the center features a Lozenge shaped white
Category

21st Century and Contemporary Unknown Contemporary Drop Necklaces

Materials

Diamond, White Diamond, Yellow Diamond, Gold, White Gold, 18k Gold, Yell...

0.48 Carat Sapphire 0.09 Carat Diamond 15k Yellow Gold Pendant Circa 1910
Located in Jesmond, Newcastle Upon Tyne
drop, ornamented with a collet set Old European round cut diamond amidst a lozenge-shaped frame. The
Category

Vintage 1910s Unknown Pendant Necklaces

Materials

Diamond, Sapphire, Yellow Gold

Vintage 18 Karat Yellow Gold and Silver Diamond Cross Pendant
Located in London, GB
and grain set old cushion and lozenge shaped diamonds, with small rose cut diamonds to each tip of the
Category

Antique Early 1900s Unknown Victorian Pendant Necklaces

Materials

Diamond, Gold, 18k Gold, Yellow Gold, Silver

Laura Munder 18K Gold Mandarin Garnet & Diamond Pendant w/ Adjustable Rolo Chain
By Laura Munder
Located in Montclair, NJ
Color - 13x10.2mm, 18.2x8.1mm & 19.9x16.5mm (approx.) (2) Natural Genuine Diamonds - Lozenge & Pear Cut
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Garnet, Mandarin Garnet, 18k Gold, Yellow Gold

19th Century Sapphire Diamond 18 Karat Rose Gold 3 Rings Ring
Located in Poitiers, FR
diamond and two lozenge patterns set with rose-cut diamonds. The three rings meet at the base to form one
Category

Antique Late 19th Century French Napoleon III Band Rings

Materials

Blue Sapphire, Sapphire, Diamond, Gold, Rose Gold, 18k Gold

Vintage 24 Carat Cabochon Cut Jadeite Jade & Round Cut Diamond Halo Ring
By Gad & Co.
Located in Miami, FL
Indulge in the elegance and allure of this 24.04 carat Jade and Diamond Halo cocktail ring
Category

1990s Asian Art Deco Cocktail Rings

Materials

Diamond, Jade, 18k Gold, White Gold

50 Carat Amethyst 11 Rose Cut Diamond Pendant Necklace Victorian 14 Karat Gold
Located in New York, NY
beautiful Victorian link chain. The diamonds are set in beaded diamond shaped lozenges around the amethyst
Category

20th Century Unknown Victorian Pendant Necklaces

Materials

Amethyst, Diamond, Gold, 14k Gold, Yellow Gold

Diamond Pendant with 1.5 Carat Chrysoberyl on Omega Chain in White & Yellow Gold
By Eytan Brandes
Located in Sherman Oaks, CA
in a navette-shaped frame of diamonds. The Madagascar chrysoberyl, in a rich shade of root beer
Category

2010s American Contemporary Pendant Necklaces

Materials

Chrysoberyl, Diamond, White Diamond, Gold, 14k Gold, White Gold, Yellow ...

Rare Antique Allegory of Love Diamond Three Color 18K Gold Oval Box, Circa 1800
Located in New York, NY
lozenge, flanked by rose bouquets. A substantial rose cut diamond on the thumbpiece acts as an opening
Category

Antique Early 19th Century Mexican Neoclassical Boxes and Cases

Materials

Diamond, Gold, 18k Gold, Rose Gold, Yellow Gold

GRS Certified 50.11 Carat Cushion No Heat Sri Lanka Blue Sapphire Ring
By Gad & Co.
Located in Miami, FL
_______________________ Diamond Details:  2 Lozenge Cut Diamonds, 0.55 Carats total 2 Trapezoid Cut Diamonds, 1.38 Carats total
Category

21st Century and Contemporary Modern Cocktail Rings

Materials

Diamond, White Diamond, Sapphire, Gold, 18k Gold, White Gold

3.95 ct. Lagoon Tourmaline Ring in 18K White Gold
By SONYA K.
Located in Brooklyn, NY
color tourmaline, is surrounded on each side by four colorless lozenge-cut diamonds set in an 18K white
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

Diamond, Tourmaline, 18k Gold, White Gold

11.91 ct. Cuprian Tourmaline Earrings, 18K White Gold
By SONYA K.
Located in Brooklyn, NY
discerning tastes. The primary stones are copper-bearing tourmalines, complimented by colorless diamonds
Category

21st Century and Contemporary American Dangle Earrings

Materials

Diamond, Tourmaline, White Gold

Antique Egyptian Revival Necklace
Located in New York, NY
) and interspersed with beige and turquoise faience scarab spacers and diamond-shaped lozenges detailing
Category

Antique 1860s Egyptian Pendant Necklaces

Materials

18k Gold

Faberge Ruby Sapphire Diamond Gold Lozenge-Shaped Brooch
By Fabergé
Located in London, GB
A Faberge ruby, sapphire and diamond lozenge-shaped brooch, with a white fluted baton-shaped motif
Category

Antique Late 19th Century Russian Victorian Brooches

Materials

Diamond, Ruby, Blue Sapphire, Yellow Gold

2.59cts E VS2 EX VG N GIA Cert Unique Lozenge Diamond Baguette Engagement Ring
By RAREVER
Located in London, GB
is crafted with Lozenge Shaped solitaire diamond 1.05 carat set in classic setting to attain the halo
Category

21st Century and Contemporary British Romantic Engagement Rings

Materials

Diamond, White Gold

Trio Lozenge Diamond Ring in 18 Karat Yellow Gold
Located in Hong Kong, HK
A Beautiful Trio Ring Featuring Three Lozenge Cut Diamonds With Yellow Color And VS Clarity
Category

21st Century and Contemporary Hong Kong Modern Three-Stone Rings

Materials

Diamond, Yellow Diamond, 18k Gold, Yellow Gold

Platinum and Diamond Lozenge Brooch
Located in Santa Fe, NM
Platinum and Diamond Lozenge Brooch C. 1915 weighing a total of 5 dwts. The center stone is an Old
Category

Vintage 1910s Brooches

Materials

Diamond, Platinum

Platinum, Lozenge-shape Pink Sapphire, and Diamonds Ring
By James Martin Jewels Ltd.
Located in New York City, NY
Platinum, Lozenge-shape Pink Sapphire 2.41 carats, Diamonds approx. .65 carat Micro-Pave-Set Ring
Category

American Fashion Rings

Tiffany & Co. Art Deco Lozenge-Cut Diamond and Emerald Bracelet
By Tiffany & Co.
Located in San Francisco, CA
fabulous Art Deco bracelet designed to feature a collection of rare and radiant center diamonds: five
Category

Vintage 1930s American Art Deco Cuff Bracelets

Materials

Diamond, Emerald

18 Karat Gold Lotus Feet, with Rose Cut Diamonds and Diamonds
By Sophie Theakston
Located in London, GB
18 karat gold Vishnu’s Feet, with lozenge-shaped rose cut diamonds in the heels and ten little
Category

21st Century and Contemporary Indian Contemporary Pendant Necklaces

Materials

Diamond, 18k Gold, Gold

Star of David Diamond Pendant
Located in Paris, IDF
An 18Kt white gold Star of David pendant which is in fact composed of six lozenge-shaped diamonds
Category

21st Century and Contemporary French Contemporary Pendant Necklaces

Materials

White Diamond

PIERRE STERLÉ. An Impressive Coral and Diamond Brooch.
By Pierre Sterlé
Located in London, GB
sporadically accented with brilliant-cut diamond-set lozenges, 1960s, signed Pierre Sterlé, maker's mark for
Category

Vintage 1960s French Brooches

Materials

Diamond, Coral, 18k Gold, Platinum

Platinum Diamond Engagement Ring with Certified Magnificent Colombian Emerald
Located in Antwerp, BE
diamonds in a lozenge pierced pattern shoot just like stars to the diamonds in the jewel's shank. The
Category

Vintage 1920s Belgian Art Deco Engagement Rings

Materials

Diamond, White Diamond, Emerald, Platinum

Art Deco Platinum Old Cut Diamond and Sapphire Ring
Located in Melbourne, AU
with eight old cut diamonds. The split shoulders arch to join the outer coronets and form a lozenge
Category

Vintage 1920s British Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

Modern Light Pink Pear Cut Diamond Ring 2 carat VS1 GIA certified
Located in PARIS, FR
Light Pink pear diamond accented with beautiful Lozenge Step cut diamond colorless diamonds. Its modern
Category

21st Century and Contemporary Hong Kong Aesthetic Movement Fashion Rings

Materials

Diamond, 18k Gold

Daria de Koning Black Star Sapphire, Diamond, Hematite Rutile Quartz Earrings
By Daria de Koning
Located in Los Angeles, CA
A chic duo of cabochon-cut black star sapphires and rose-cut "salt & pepper" diamonds compliment
Category

2010s American Artist Dangle Earrings

Materials

Diamond, Quartz, Star Sapphire, 18k Gold

  • 1
Get Updated with New Arrivals
Save "Lozenge Diamond", and we’ll notify you when there are new listings in this category.

Lozenge Diamond For Sale on 1stDibs

On 1stDibs, you can find the most appropriate lozenge diamond for your needs in our varied inventory. Frequently made of Gold, 18k Gold and Yellow Gold, this item was constructed with great care. You can easily find a 28 antique edition and 12 modern creations to choose from as well. If you’re looking for a lozenge diamond from a specific time period, our collection is diverse and broad-ranging, and you’ll find at least one that dates back to the 19th Century while another version may have been produced as recently as the 21st Century. As it relates to this specific piece, our collection includes designs that are universally popular, but 1 Carat and 1.5 Carat carat weights, specifically, are sought with frequency. A lozenge diamond from Single Stone, Hancocks and Van Cleef & Arpels — each of whom created a beautiful version of this treasured accessory — is worth considering. A mixed cut version of this piece has appeal, but there are also brilliant cut and round cut versions for sale. When shopping for a lozenge diamond, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a Lozenge Diamond?

The price for a lozenge diamond starts at $1,981 and tops out at $125,000 with these rings, on average, selling for $9,550.

The Legacy of Diamond in Jewelry Design

Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.

From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!

There are several factors that set diamonds apart from other stones, and these points are important to our gem education.

Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.

In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).

When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement ringsvintage engagement rings or Art Deco engagement rings

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.