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Natural Sandawana Emerald Octagon Cut Certified Gemstone 1.51 Cts Green Emerald.
Located in Chicago, IL
Natural Sandawana Emerald Octagon Cut Certified Gemstone 1.51 Cts Green Emerald. Certification
Category

2010s Zimbabwean Art Deco Loose Gemstones

Materials

Emerald

AGL Certified Gemstone Natural Corundum Pink Sapphire Weighing 2.92 Carats
By OGI Ltd
Located in New York, NY
type of precious gemstone that has been formed under the earth's crust over millions of years. The
Category

Mid-20th Century Sri Lankan Contemporary Loose Gemstones

Materials

Pink Sapphire

Natural 1.18Ct Deep Green Blue Teal Sapphire Heart Cut IGI Certified Gemstone
By Gems and Jewels UK
Located in Birmingham, GB
Natural 1.18Ct Deep Green Blue Teal Sapphire Heart Cut IGI Certified Gemstone Fine Deep Green Blue
Category

21st Century and Contemporary More Jewelry

1.34ct Colour Change Garnet Natural Cushion Cut Rare IGI Certified Gemstone
By Gems and Jewels UK
Located in Birmingham, GB
1.34ct Colour Change Garnet Natural Cushion Cut Rare IGI Certified Gemstone Unique Rare Untreated
Category

21st Century and Contemporary More Jewelry

Materials

Garnet

GFCO Certified 4.27ct Natural Tourmaline gemstone, Octagon, 10.41x8.52x5.39mm.
By GRALJEWELRY
Located in Daugavpils, LV
Natural Tourmaline gemstone GFCO Laboratory certified Gemstone Color: Pink Gemstone Type
Category

2010s Nigerian Loose Gemstones

Materials

Tourmaline

GFCO certified Natural 8.44Ct Tourmaline gemstone, Heart cut, Nigeria
By GRALJEWELRY
Located in Daugavpils, LV
Natural Tourmaline gemstone GFCO Laboratory certified Gemstone Color: Orange-Pink Gemstone Type
Category

2010s Nigerian Loose Gemstones

Materials

Tourmaline

GFCO Certified 5.83Ct Natural Tourmaline Indicolite gemstone Octagon Afghanistan
By GRALJEWELRY
Located in Daugavpils, LV
Natural Tourmaline Indicolite gemstone GFCO laboratory certified Gemstone Color: Blue Gemstone Type
Category

2010s Afghan Loose Gemstones

Materials

Tourmaline, Indicolite

GFCO certified Natural 2.92ct Hessonite Garnet gemstone, Octagon cut. Tanzania.
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet gemstone GFCO certified Gemstone Color: yellowish orange Gemstone Type: Garnet
Category

2010s Tanzanian Loose Gemstones

Materials

Garnet, Hessonite

GFCO Certified 3.71ct Natural Moonstone gemstone, Oval cut, Burma
By GRALJEWELRY
Located in Daugavpils, LV
Natural Rainbow Moonstone gemstone Laboratory GFCO certified Gemstone Color: White with blue sheen
Category

2010s Burmese Loose Gemstones

Materials

Moonstone

GFCO Certified 3.91ct Natural Rubellite Tourmaline gemstone, Scissor cut.
By GRALJEWELRY
Located in Daugavpils, LV
Natural Tourmaline gemstone GFCO laboratory certified Gemstone Color: Pink Gemstone Type
Category

2010s Nigerian Loose Gemstones

Materials

Tourmaline

GFCO Certified 15.51ct Natural Watermelon Tourmaline gemstone Origin Afghanistan
By GRALJEWELRY
Located in Daugavpils, LV
Natural Watermelon Tourmaline gemstone GFCO laboratory certified Gemstone Color: PINK-green
Category

21st Century and Contemporary Afghan Loose Gemstones

Materials

Tourmaline

Tourmaline Pink 7.06Ct natural gemstone, Cushion cut, Nigeria, GFCO certified
By GRALJEWELRY
Located in Daugavpils, LV
Natural Pink Tourmaline Loose gemstone origin Tanzania! GFCO Laboratory certified Gemstone Color
Category

2010s Nigerian Loose Gemstones

Materials

Tourmaline

Spinel Purple 3.56Ct natural gemstone, Cushion cut, Tanzania, GFCO certified
By GRALJEWELRY
Located in Daugavpils, LV
Natural Purple Spinel Loose gemstone origin Tanzania! GFCO Laboratory certified Gemstone Color
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

GFCO Certified 3.83Ct Natural Garnet Rhodolite gemstone, Heart Brilliant cut
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet Rhodolite gemstone GFCO Laboratory certified Gemstone Color: VIVID purplish red
Category

2010s Tanzanian Loose Gemstones

Materials

Garnet

GFCO Certified 6.26ct Natural Pyrope-Almandine Garnet gemstone, Cushion cut.
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet Rhodolite gemstone Laboratory certified Gemstone Color: purple Gemstone Type
Category

2010s Tanzanian Loose Gemstones

Materials

Garnet

GFCO Certified Natural 2.40Ct Blue Cobalt Spinel gemstone, Origin Tanzania.
By GRALJEWELRY
Located in Daugavpils, LV
Natural Blue Cobalt Spinel gemstone GFCO Laboratory certified Gemstone Color: Blue Gemstone Type
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Spinel

GFCO Certified Natural VS 3.22ct Violet Spinel gemstone, Cushion cut, Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Natural Spinel gemstone GFCO Laboratory certified Gemstone Color: Violet Gemstone Type: Spinel
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Spinel

GFCO Certified Natural 3.51Ct Blue Cobalt Spinel gemstone, Heart cut, Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Natural Spinel gemstone GFCO Laboratory certified Gemstone Color: Blue Gemstone Type: Spinel
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Spinel

Natural Bestnasite Gemstone 2.67 Carats Bastnasite Jewelry Bastnasite Gemstone
Located in Bangkok, TH
Natural Bastnasite Gemstone, Available For Sale At Wholesale Price,Certified Gemstone Natural High
Category

21st Century and Contemporary Pakistani Modern Loose Gemstones

Materials

Brown Diamond

1.36 Carats Natural Blue Apatite Stone From Madagascar Apatite Gemstones
Located in Bangkok, TH
, Flawless 1.36 Carats Certified Gemstone From Madagascar. Product Information : Weight: 1.36 carats
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Apatite

Opal Ethiopian 16.94Ct natural gemstone, Oval cabochon, , Certificate GFCO
By GRALJEWELRY
Located in Daugavpils, LV
Natural Ethiopian Opal gemstone GFCO certified Gemstone Color: White Multicolor Gemstone Type
Category

2010s Ethiopian Loose Gemstones

Materials

Opal

Opal Ethiopian 16.94Ct natural gemstone, Oval cabochon, , Certificate GFCO
By GRALJEWELRY
Located in Daugavpils, LV
Natural Ethiopian Opal gemstone GFCO laboratory certified Gemstone Color: Black Multicolor
Category

2010s Ethiopian Loose Gemstones

Materials

Opal

Natural Garnet Spessartite Loose gemstone 5.17 Ct., Fanta color.
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet Spessartite Loose gemstone 5.17 Ct., Fanta color. Colourstone certified Gemstone
Category

2010s African Loose Gemstones

Materials

Garnet

Spinel Lavender Violet 4.27Ct natural gemstone, Cushion cut, Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Natural Lavender-Violet Spinel Loose gemstone GFCO Laboratory certified Gemstone Color: Lavender
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Garnet Spessartite Loose 5.50Ct natural gemstone, Cushion cut, Certificate GFCO
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet Spessartite loose gemstone 5.50 Ct. GFCO certified Gemstone Color: VIVID Orange
Category

2010s Tanzanian Loose Gemstones

Materials

Garnet

Spinel Bluish Violet 3.05Ct natural gemstone, Cushion Tanzania, GFCO Certificate
By GRALJEWELRY
Located in Daugavpils, LV
Natural Bluish-Violet Spinel Loose gemstone GFCO Laboratory certified Gemstone Color: Bluish
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Garnet Spessartite Loose gemstone 6.73 Ct. Fanta color. Certificate GFCO
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet Spessartite loose gemstone 6.73 Ct. From Tanzania! Colourstone certified Gemstone
Category

2010s Tanzanian Loose Gemstones

Materials

Garnet

Natural Tanzanite loose gemstone 1.34 ct., Round Cut, Certificate, Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Natural Tanzanite loose gemstone IGI Certified gemstone Gemstone Color: purplish-violet Gemstone
Category

2010s Tanzanian Loose Gemstones

Materials

Tanzanite

Natural Garnet Tsavorite Lose gemstone 1.66 ct., cushion, Tanzania, Certificate!
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet Tsavorite gemstone from Tanzania GFCO certified Gemstone Color: VIVID Green
Category

2010s Tanzanian Loose Gemstones

Materials

Garnet, Tsavorite

Natural Tanzanite Loose Gemstone 9.39 ct., High Quality, Certificate, Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Natural Tanzanite Loose Gemstone 9.39 ct., High Quality, Certificate, Tanzania ! GFCO Certified
Category

2010s Tanzanian Loose Gemstones

Materials

Tanzanite

Natural Tanzanite lose gemstone 4.73 ct., Pear cut, Certificate GFCO, Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Natural Tanzanite gemstone GFCO Certified gemstone Gemstone Color: Violet-Blue Gemstone Type
Category

2010s Tanzanian Loose Gemstones

Materials

Tanzanite

Natural Garnet Spessartite Loose Gemstone 5.23 Ct., Oval cut, Certificate GFCO
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet Spessartite loose gemstone 5.23 Ct. GFCO certified Gemstone Color: Fanta Orange
Category

2010s Tanzanian Loose Gemstones

Materials

Garnet

Natural Moonstone Loose gemstone 3.25 ct., Oval cut, Certificate!
By GRALJEWELRY
Located in Daugavpils, LV
GFCO certified Gemstone Color: White with Multicolor Sheen Gemstone Type: Rainbow Moonstone Gemstone
Category

2010s Malagasy Loose Gemstones

Materials

Moonstone

Natural Tourmaline gemstone 4.86 ct., Octagon cut, Afghanistan, Certificate!
By GRALJEWELRY
Located in Daugavpils, LV
certified Gemstone Color: Pink and Green Gemstone Type: Watermelon Tourmaline Gemstone size: 15.13x6.93x5.10
Category

2010s Afghan Loose Gemstones

Materials

Tourmaline

Natural Grey Spinel loose gemstone 2.06 ct. High quality, Tanzania, Certificate
By GRALJEWELRY
Located in Daugavpils, LV
Natural Grey Spinel gemstone from Tanzania GFCO Laboratory certified Gemstone Color: Grey Gemstone
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Blue Spinel loose gemstone 4.68 ct., High quality, Certificate GIA!
By GRALJEWELRY
Located in Daugavpils, LV
Natural Blue Spinel loose gemstone GIA Laboratory certified Gemstone Color: Blue Gemstone Type
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Garnet Tsavorite Lose gemstone 1.30 ct., Oval cut, Tanzania, Certificate
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet Tsavorite gemstone GFCO certified Gemstone Color: VIVID Green Gemstone Type: Garnet
Category

2010s Tanzanian Loose Gemstones

Materials

Garnet, Tsavorite

Natural Lavender Purple spinel quality VS, 3.13 Ct. gemstone, Cushion cut
By GRALJEWELRY
Located in Daugavpils, LV
Natural Lavender Purple Spinel gemstone From Burma! Laboratory certified Gemstone Color: Lavender
Category

2010s Burmese Loose Gemstones

Materials

Spinel

Spinel Pink loose 3.28Ct natural gemstone, Oval cut, Certificate GFCO, Sri Lanka
By GRALJEWELRY
Located in Daugavpils, LV
Natural Pink Spinel loose gemstone GFCO Laboratory certified Gemstone Color: pink Gemstone Type
Category

2010s Burmese Loose Gemstones

Materials

Spinel

Natural Grey-blue Spinel loose gemstone 2.05 ct., cushion cut, Origin Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Natural Grey-blue Spinel gemstone from Tanzania GFCO Laboratory certified Gemstone Color: Blue
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Grey Spinel loose gemstone 2.33 ct., High quality, Oval cut, Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Natural Grey Spinel gemstone from Tanzania GFCO Laboratory certified Gemstone Color: Bluish-Grey
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Moonstone Loose gemstone 2.91 ct., Oval cut, Certificate! Madagascar!
By GRALJEWELRY
Located in Daugavpils, LV
GFCO certified Gemstone Color: White with Multicolor Sheen Gemstone Type: Rainbow Moonstone Gemstone
Category

2010s Malagasy Loose Gemstones

Materials

Moonstone

Natural Tourmaline rubellite loose gemstone 3.19 ct., VIVID Pink , Certificate !
By GRALJEWELRY
Located in Daugavpils, LV
Natural Tourmaline Rubellite Loose gemstone 3.19 ct., Origin Afghanistan GFCO laboratory certified
Category

2010s Afghan Loose Gemstones

Materials

Tourmaline

Natural Tourmaline rubellite loose gemstone 2.11 ct., VIVID Pink , Certificate!
By GRALJEWELRY
Located in Daugavpils, LV
Natural Tourmaline Rubellite Loose gemstone 2.11 ct., Origin Afghanistan GFCO laboratory certified
Category

2010s Afghan Loose Gemstones

Materials

Tourmaline

Natural Moonstone Loose gemstone 4.92 ct., Octagon cut, Certificate! Madagascar!
By GRALJEWELRY
Located in Daugavpils, LV
GFCO certified Gemstone Color: White with Multicolor Sheen Gemstone Type: Rainbow Moonstone Gemstone
Category

2010s Malagasy Loose Gemstones

Materials

Moonstone

Natural Garnet Rhodolite Loose gemstone 5.28 ct, Cushion cut, certificate
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet Rhodolite Loose gemstone 5.28 ct, Cushion cut, certificate! Laboratory certified
Category

2010s Sri Lankan Loose Gemstones

Materials

Garnet, Rhodolite

Natural Garnet Rhodolite high quality! loose gemstone 7.53 ct., Certificate
By GRALJEWELRY
Located in Daugavpils, LV
Laboratory certified Gemstone Color: Purplish-RED Gemstone Type: Garnet Rhodolite Gemstone size
Category

2010s Tanzanian Loose Gemstones

Materials

Garnet, Rhodolite

Natural Garnet Loose gemstone 3.13 ct., Octagon cut, Rare Color, Origin Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet Loose gemstone 3.13 ct., Octagon cut, Rare Color, Origin Tanzania GFCO certified
Category

2010s Tanzanian Loose Gemstones

Materials

Garnet

Natural Tourmaline gemstone 9.33 ct., Cushion cut, Nigeria, Certificate GFCO!
By GRALJEWELRY
Located in Daugavpils, LV
Natural Pink Tourmaline gemstone from Nigeria. GFCO laboratory certified Gemstone Color: Pink
Category

2010s Nigerian Loose Gemstones

Materials

Tourmaline

Natural Garnet Rhodolite 3.46 Ct. gemstone, Oval cut, Certificate AGL, Sri-Lanka
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet Rhodolite gemstone Laboratory certified Gemstone Color: purple Gemstone Type
Category

2010s Sri Lankan Loose Gemstones

Materials

Garnet, Rhodolite

GFCO Certified VS 10.37Ct Natural Tanzanite, Fancy cushion cut
By GRALJEWELRY
Located in Daugavpils, LV
Natural Tanzanite gemstone GFCO Certified gemstone Gemstone Color: Vivid Blue Gemstone Type
Category

21st Century and Contemporary Tanzanian Loose Gemstones

Materials

Tanzanite

Natural Tourmaline gemstone 5.69 ct., Octagon cut, Afghanistan, Certificate
By GRALJEWELRY
Located in Daugavpils, LV
Afghanistan, Certificate GFCO GFCO laboratory certified Gemstone Color: Pink and Green Gemstone Type
Category

2010s Afghan Loose Gemstones

Materials

Tourmaline

Natural blue Spinel loose gemstone 2.07 ct. Certificate, Cushion Origin Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Natural Blue Spinel gemstone from Tanzania GFCO Laboratory certified Gemstone Color: greyish-Blue
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Unique Spinel Bluish Violet natural 4.67Ct gemstone, Cushion cut, Tanzania, GIA
By GRALJEWELRY
Located in Daugavpils, LV
Unique Natural Spinel Loose gemstone GIA Laboratory certified Gemstone Color: Bluish Violet
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Violetish-BLUE Spinel loose gemstone 3.08 ct., High quality, Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Natural Violetish-BLUE Spinel Loose gemstone GFCO Laboratory certified Gemstone Color: Violetish
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Violet Spinel loose gemstone 2.97 ct, High quality, Certificate Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Laboratory certified Gemstone Color: Lavender Violet Gemstone Type: Spinel Gemstone size: 8.96x8.90x4.77 mm
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Violet Spinel loose gemstone 2.17 ct., High quality, Origin Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Laboratory certified Gemstone Color: Violet Gemstone Type: Spinel Gemstone size: 8.52x5.74x4.78 mm Cut Grade
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Violet Spinel loose gemstone 2.54 ct., High quality, Cushion, Tanzania
By GRALJEWELRY
Located in Daugavpils, LV
Laboratory certified Gemstone Color: Violet Gemstone Type: Spinel Gemstone size: 8.57x7.3x4.58 mm Cut Grade
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Grey Spinel loose gemstone 2.07 ct., High quality, Certificate CFCO
By GRALJEWELRY
Located in Daugavpils, LV
Laboratory certified Gemstone Color: Bluish-Grey Gemstone Type: Spinel Gemstone size: 7.39x6.24x5.22 mm Cut
Category

2010s Tanzanian Loose Gemstones

Materials

Spinel

Natural Garnet Rhodolite high quality! loose gemstone 4.02 ct., Cushion cut
By GRALJEWELRY
Located in Daugavpils, LV
Natural Garnet Rhodolite loose gemstone high quality!!! Laboratory certified Gemstone Color: Vivid
Category

2010s Sri Lankan Loose Gemstones

Materials

Garnet

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Certified Gemstones For Sale on 1stDibs

Browse a vast assortment of certified gemstones for sale on 1stDibs. Frequently made of Gold, Platinum and 18k Gold, these items were constructed with great care. Find a collection of 3 vintage versions or 71 modern creations for a more contemporary example of these cherished accessories. Our collection, which features older pieces for sale from the 20th Century and newer versions made as recently as the 21st Century, has proven very popular over the years. The designs in our inventory of certified gemstones bearing Contemporary or Modern hallmarks are very popular. Many examples in our inventory of these items are appealing no matter their origins, but Merkaba, Tamir and FERRUCCI produced popular versions that are worth a look. Many pieces in our collection are stylish for most occasions, but Diamond versions, from our inventory of 48, can add a particularly distinctive touch to your look, day or night. Today, if you’re looking for oval cut certified gemstones and are unable to find the perfect match, our selection also includes cushion cut and emerald cut alternatives. Most of our certified gemstones for sale are for women, but there are 29 pieces available to browse for men.

How Much are Certified Gemstones?

Prices for certified gemstones start at $353 and top out at $325,000 with these rings, on average, selling for $28,000.