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20th Century Loose Gemstones

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Period: 20th Century
AGL Certified Gemstone Natural Corundum Pink Sapphire Weighing 2.92 Carats
Located in New York, NY
AGL certificate Natural Pink Sapphire weighing 2.92 carats Purplish Pink Color Oval Shaped, mix cut Heated Color Stability Excellent Measuring 8.63x7.11x5.10 mm Natural corundum pi...
Category

Sri Lankan Contemporary 20th Century Loose Gemstones

Materials

Pink Sapphire

10.34ct Antique Cushion ! a collectors dream! "Taylor Swift" Style
Located in Ramat Gan, IL
10.34ct Antique Cushion Diamond – A Timeless Masterpiece Indulge in the brilliance of history with this breathtaking **10.34-carat Antique Cushion-Cut Diamond**. Showcasing a classi...
Category

North American Art Deco 20th Century Loose Gemstones

Materials

Diamond

Plat /18kt Yellow Gold Diamond .45ct. Moon Pendant
Located in New York, NY
Thia 18 karat yellow gold pendant is crafted in a sand blasted finish. The pendant is designed with a texture to give the feel of the moon's craters. A platinum crescent set with 0.4...
Category

American Retro Vintage 20th Century Loose Gemstones

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

Hakimoto by Jewel of Ocean Pair of 17.5mm White Round Australian South Sea Pearl
Located in Hicksville, NY
Hakimoto By Jewel Of Ocean Round South Sea Pearl Pair of 17.5 mm White 16.7 Grams Australian South Sea Pearl Aproximate
Category

American Modern 20th Century Loose Gemstones

Materials

Cultured Pearl, South Sea Pearl

3.02 + 3.01 Carat Matching Pair of “Pigeon’s Blood” Rubies – GRS Certified
Located in Ramat Gan, IL
An extraordinary rarity, this matching pair of rubies weighs 3.02 and 3.01 carats respectively, both certified by GRS as possessing the coveted “Pigeon’s Blood” color. This designati...
Category

European Art Deco 20th Century Loose Gemstones

Materials

Ruby

GIA Certified Old-Mine Cut Loose Diamond 1.08ct
Located in Laguna Beach, CA
1.08 carat old-mine cut diamond. GIA graded E color, VS1 clarity. GIA grading report number is 1236538153. Comes with a full certificate.
Category

20th Century Loose Gemstones

Materials

Diamond

GIA Certified Carved Colombia Emerald Loose Stone Weighing 4.35 Carats
Located in New York, NY
Introducing our exquisite GIA certified carved Colombia Emerald loose stone, a true masterpiece of nature. This captivating gem weighs a remarkable 4.35 carats, making it a truly val...
Category

Colombian Contemporary 20th Century Loose Gemstones

Materials

Emerald

Antique Cushion-Cut Diamond – 2.47ct
Located in Berlin, BE
Natural Antique Cushion-Cut Diamond – 2.47ct A 2.47-carat natural diamond in an antique round cushion cut. Color: K, Clarity: VVS2, with medium fluorescence. A visible fracture filli...
Category

German Aesthetic Movement 20th Century Loose Gemstones

Materials

Diamond

GIA Certified 3.48 Carat Rare Pinkish Purple Sapphire
Located in San Francisco, CA
This 3.59 carat Cushion Antique shaped GIA Certified Pinkish Purple Sapphire was selected by our experts for its Rare luster.
Category

Sri Lankan 20th Century Loose Gemstones

Materials

Sapphire, Pink Sapphire, Purple Sapphire

GIA Certified No Treatment Octagonal Natural Quartz Citrine Weighing 42.43 Carat
Located in New York, NY
Rarity is an essential factor in determining the value of gemstones. Natural citrines are rarer than amethysts or smoky quartz because they occur less frequently in nature. The abse...
Category

Malagasy Contemporary 20th Century Loose Gemstones

Materials

Citrine, Quartz

42.82 Carat Old European Diamond Layout – GIA Certified
Located in Ramat Gan, IL
Exceptional 42.82 Carat Old European Diamond Layout – GIA Certified An extraordinary collection of 19 Old European cut diamonds, totaling an impressive 42.82 carats. This meticulous...
Category

European 20th Century Loose Gemstones

Materials

Diamond

Oval loose ruby with cerificate 9x7mm
Located in Boca Raton, FL
Bright ruby with a certificate oval gemstone with a certificate. Measuring 9x7mm, the ruby is nice and bright pinkish red color. Certificate of authenticity comes with purchase! AB...
Category

20th Century Loose Gemstones

Materials

Ruby

LFG Certified 3.78 K/VS1 Antique Old European Round Brilliant Cut Diamond
Located in Paris, FR
This Antique Old European Round Brilliant cut Diamond weights 3.78 carats with a K color (Beautiful white face up) and VS1 Clarity (Loupe Clean). The high quality of its cut let the ...
Category

Unknown Belle Époque Vintage 20th Century Loose Gemstones

Materials

Diamond

Large Natural Citrine Gemstone W Arabic Script In Box
Located in New York, NY
A large natural citrine gemstone with curved Arabic script on both sides. The gemstone features a faceted surface that enhances its brilliance, and it is elegantly displayed in a bla...
Category

Unknown 20th Century Loose Gemstones

Materials

Citrine, Sterling Silver

2.12ct Pink Purple Natural Rhodolite Garnet Oval Cut Loose Gem VVS
Located in Birmingham, GB
2.12ct Pink Purple Natural Rhodolite Garnet Oval Cut Loose Gem 7.7x6.7mm VVS Fine Natural Rhodolite Garnet Gemstone. 2.12 Carat with a beautiful vivid purple pink colour and excelle...
Category

20th Century Loose Gemstones

Materials

Garnet, Rhodolite

1.95-Carat Antique Emerald-Cut Fancy Deep Brown-Orange Diamond (GIA Certified)
Located in Ramat Gan, IL
This exquisite 1.95-carat antique emerald-cut diamond is a rare treasure of extraordinary depth and allure. Certified by the GIA as Fancy Deep Brown-Orange with SI1 clarity, it radia...
Category

Israeli Art Deco 20th Century Loose Gemstones

Materials

Diamond, Emerald

GIA Certificated Oval Carved Double Sided Cabochon Emerald Weighing 53.64 Carats
Located in New York, NY
G I A G EMO L O G IC A L R E P O R T EMERALD REPORT GIA REPORT 522173152 Shape Oval Carved Double Cabochon Transparency Translucent Color Green Species Natural Beryl TREATMENT Clarity Enhanced (F2) One loose stone Weight: 53.64 carats Measurements: 26.97 x 19.90 x 12.90 mm An oval carved double-sided cabochon emerald weighing 53.64 carats, certified by GIA (Gemological Institute of America), can be considered rare and valuable Comments: Due to their growth conditions in nature and recovery methods, most emeralds contain surface reaching features. For this reason, clarity enhancement is a common trade practice Larger emeralds are generally rarer and more valuable, assuming all other quality factors are favorable GIA is the most established certification company in the world. They have been around since 1931 and are the foremost authority on diamonds, gems and pearls. They are a non-profit organization that sets the standards for jewels and identification world-wide. Gemstones are rare natural resources of nature. Each gemstone is unique. One can compare the market for gemstones well with the art market Untreated gemstones are best suited for investment. In the case of sapphire and ruby, this implies that they are not heated, as 98...
Category

Colombian Contemporary 20th Century Loose Gemstones

Materials

Emerald

Top Grade Natural Icy Type Imperial Green Halo Donut Jadeite Jade Loose Stone
Located in Kowloon, HK
Immerse yourself in the captivating beauty of this stunning natural imperial green jade donut pendant. Crafted from the finest Type-A Myanmar jadeite jade, this pendant is a true mas...
Category

Hong Kong Art Deco 20th Century Loose Gemstones

Materials

Jade

Beauteous 4.10 Carats Natural Green Loose Emerald Zambia Mine Ring Jewellery
Located in Peshawar, PK
Loose Emerald Weight: 4.10 Carats Dimension: 9.3x9.1x6.5 Mm Origin: Zambia Color: Green Certificate: On Customer Demand Treatment: Non . Zambia, often referred to as the "Jewel of ...
Category

Zambian Arts and Crafts 20th Century Loose Gemstones

Materials

Beryl, Emerald

GIA Certified 131.22 Carat Rose Shaped Hand Carved Natural Coral Ornament
Located in Stamford, CT
Masterfully carved 131.00ct blooming rose coral. Natural, undyed orangy pink high luster color. It measures 47.66 x 31.34 x 25.92 mm. Unlike may gems, Coral is organic and slow growi...
Category

20th Century Loose Gemstones

Materials

Coral

11.50 Carat Enchanting Elegance Stunning Asscher Cut Green Amethyst Ring Gem
Located in Peshawar, PK
Faceted Green Amethyst Weight: 11.50 Carats Dimension: 14.5x11.7x9.9 Mm Origin: Brazil Shape: Emerald Cut/Facet: Asscher Color: Green Certificate: On Demand Green amethyst, als...
Category

Brazilian Arts and Crafts 20th Century Loose Gemstones

Materials

Amethyst

27.35 Carats Natural Loose Bicolor Tourmaline 24 Mm Long For Necklace Jewellery
Located in Peshawar, PK
Loose Bicolor Tourmaline Weight: 27.35 Carats Dimension: 24X12X10.7 Mm Origin: Kunar Afghanistan Shape: Emerald Color: Green & Peach Yello...
Category

Afghan Arts and Crafts 20th Century Loose Gemstones

Materials

Multi-gemstone, Tourmaline

29.75 Carats Gigantic Natural Loose Aquamarine Included Gem For Necklace Jewelry
Located in Peshawar, PK
Loose Aquamarine Weight: 29.75 Carats Dimension: 21x16x13 Mm Origin: Shigar Valley Pakistan Shape: Cushion Color: Light Seafoam Treatment: Non / Natural Aquamarine is a mesmerizi...
Category

Pakistani Arts and Crafts 20th Century Loose Gemstones

Materials

Aquamarine

GIA Certified - 8.19ct Atnuiqe Cusion Brilliant diamond - "Taylor Swift" Style
Located in Ramat Gan, IL
**GIA Certified 8.19ct Cushion Brilliant Diamond** Discover timeless elegance with this exquisite 8.19-carat Cushion Brilliant diamond. Certified by the Gemological Institute of Ame...
Category

American Art Deco 20th Century Loose Gemstones

Materials

Diamond

2.39 Carat Genuine and Natural Oval-Shaped Certified Brazilian Alexandrite
Located in New York, NY
A beautiful and fine-quality oval-shaped mixed-cut Brazilian Alexandrite with 90%-100% (Prominent) Color-Change and Excellent Quality of Color-Change from Blue-Green to Purple-Pink c...
Category

Brazilian 20th Century Loose Gemstones

Materials

Alexandrite

6.14 Carat Tourmaline Gemstone, Cushion Cut Blue Green Loose Solitaire
Located in Greensboro, NC
Shape/Cut: Cushion Color: Blue Green Origin: Afghanistan Dimensions (mm): 11.3 x 9.1 x 8.3 Weight: 6.14ct This gemstone was cut by Clay Zava of Zava Mastercuts. Please check ou...
Category

Afghan 20th Century Loose Gemstones

Materials

Tourmaline

Natural 7.60 Carat Loose Dark Purple Amethyst Trilliant Shape from Brazil
Located in Peshawar, PK
Gemstone Type : Amethyst Weight : 7.60 Carats Dimensions : 14x13.4x8.9 mm Clarity : Eye Clean Origin : Brazil Color: Purple Shape:Trillion Certificate: On Demand Month: February Purp...
Category

Brazilian Arts and Crafts 20th Century Loose Gemstones

Materials

Amethyst

GIA Certified Round Brilliant Cut Loose Diamond 1.19ct
Located in Laguna Beach, CA
Round brilliant cut, 1.19 carat. GIA graded J color, Vs1 clarity, good symmetry. 57% table size is very good for brilliance. Faces up very attractive and brilliant. GIA lab gradin...
Category

20th Century Loose Gemstones

Materials

Diamond

Vintage Grade A Lavender Jade Finger Citron Monkey and Grasshopper Carving
Located in New York, NY
A masterful symbol of abundance and longevity, this antique jade carving features a detailed finger citron—also known as Buddha’s Hand—adorned with a playful monkey and a delicate gr...
Category

20th Century Loose Gemstones

Materials

Jade

GIA Certified Round Brilliant Cut Loose Diamond 0.83ct
Located in Laguna Beach, CA
Round brilliant cut diamond, .83 carats. GIA graded I color, I1 clarity. The clarity looks more like a Si2 grade. The thin feather under the crown facets is hard to find even with a ...
Category

20th Century Loose Gemstones

Materials

Diamond

Hakimoto By Jewel Of Ocean Pair of 18 mm White Round Australian South Sea Pearl
Located in Hicksville, NY
Hakimoto By Jewel Of Ocean Round South Sea Pearl Pair of 18 mm White 16.7 Grams Australian South Sea Pearl Aproximate
Category

American Modern 20th Century Loose Gemstones

Materials

South Sea Pearl

90 Carat Colombia Emerald Massive Piece Loose Gemstone Head Turner
Located in Hung Hom, HK
Elevate your collection with this remarkable 90 carat Colombian emerald, a gemstone that radiates sophistication and luxury. Known as the world’s premier source of emeralds, Colombia...
Category

Japanese Art Nouveau Vintage 20th Century Loose Gemstones

Materials

Emerald

Hakimoto by Jewel Of Ocean 17.7 mm Special Gem Quality Round South Sea Pearl
Located in Hicksville, NY
Hakimoto By Jewel Of Ocean Round South Sea Pearl 17.7 mm Special 7.7 Grams Scecial Color South Sea Pearl Approximate
Category

American Modern 20th Century Loose Gemstones

Materials

Cultured Pearl, South Sea Pearl

Extra Large 22k Natural Crystalized Sponge/Leaf Gold Nugget Specimen 116.7 Grams
Located in New York, NY
This exceptional natural gold nugget specimen weighs 116.7 grams and features intricate crystallized sponge and leaf-like formations, with approximately 50 grams of pure 22k gold. Or...
Category

20th Century Loose Gemstones

Materials

Quartz

Hakimoto by Jewel Of Ocean Pair of 17 mmWhite Round Australian South Sea Pearl
Located in Hicksville, NY
Hakimoto By Jewel Of Ocean Round South Sea Pearl Pair of 16.9-17 mm White 14 Grams Australian South Sea Pearl Aproximat
Category

American Modern 20th Century Loose Gemstones

Materials

Cultured Pearl, South Sea Pearl

GIA Certified 3.02 Carat Princess Cut Natural Diamond
Located in Coral Gables, FL
Loose 3.02 Carat Princess Cut Diamond GIA Graded (Report #10155902) As I Color and VS2 Clarity.
Category

20th Century Loose Gemstones

Materials

Diamond

GIA Certified Round Brilliant Cut Loose Diamond 1.78ct
Located in Laguna Beach, CA
GIA graded 1.78 carat round brilliant cut diamond. M color, slightly yellow. The clarity is i1 with an inclusion well hidden under the crown facets. The di...
Category

20th Century Loose Gemstones

Materials

Diamond

Australian Loose Solid Oval Opal of 5.00ct (17mm x 11mm). Lightning Ridge.
Located in MELBOURNE, AU
This Australian Loose Solid Opal is of impressive 5.00ct (17mm x 11mm) from Lightning Ridge Displaying truly unique spectrum of colours, white-greyish toned body with striking fla...
Category

Australian Vintage 20th Century Loose Gemstones

Materials

Opal

Natural loose 1.45 Carat H I1 Round Brilliance Diamond
Located in New York, NY
ITEM DESCRIPTION ID #:NYC57483 Stone Shape:Round Brilliance Diamond Weight:1.45 carat Clarity:I1 Color:H Cut: Round Measurements: 6.91 x 6.93 x 4.49 mm Appraisal Value:$2698.00 Our...
Category

20th Century Loose Gemstones

Materials

Diamond

GIA Certified Round Brilliant Cut Loose Diamond 1.00ct
Located in Laguna Beach, CA
1.00 carat round brilliant cut diamond. GIA graded E color, i3 clarity. The GIA report number is 2239388857. They were overly harsh on the clarity grade. Nothing can be seen with the...
Category

20th Century Loose Gemstones

Materials

Diamond

1.51 Carat Loose Padparadscha Sapphire, Cushion Cut GIA Graded Solitaire
Located in Greensboro, NC
Shape/Cut: Cushion Color: Orangy Pink Treatment: Heating Dimensions (mm): 6.76 x 5.73 x 4.13 Weight: 1.51ct GIA Report Number: 2195828370 Please check out the enlarged pictur...
Category

Unknown 20th Century Loose Gemstones

Materials

Sapphire

Loose Peridot - Cushion cut - 62.50ct
Located in SYDNEY, AU
A loose deep green Peridot, of cushion cut, and 62.50cts. This stone is available to be set into the piece of your choice or kept to be admired on its own.
Category

20th Century Loose Gemstones

Materials

Peridot

Unique 0.71ct Natural Green Blue Sapphire Cushion Rare Loose Gem 6.4x5mm VS
Located in Birmingham, GB
Unique 0.71ct Natural Green Blue Sapphire Cushion Rare Loose Gem 6.4x5mm VS Unique Natural Green Blue Cushion Cut Australian Sapphire Gemstone. 0.71 Carat with a beautiful unique vi...
Category

20th Century Loose Gemstones

Materials

Blue Sapphire, Sapphire

Hakimoto Pair of 18 mm Round Silver Tahiti Naget Baroque Pearl
Located in Hicksville, NY
Hakimoto Pair Of 18 mm Round Silver Naget Tahiti Baroque Pearl 14.2 Grams Aproximate
Category

American 20th Century Loose Gemstones

Materials

Pearl

2.6 ct Heart London Blue Topaz 8X8 Fantasy Cut
Located in Warren, NJ
Elevate your jewelry collection with the stunning 2.6 ct Heart London Blue Topaz, a gemstone that exudes sophistication and elegance. The fantasy cut of this topaz stone, measuring 8...
Category

Vintage 20th Century Loose Gemstones

Materials

Topaz, Blue Topaz

Hakimoto Pair of 14 mm Pink Botton Shape Cultured Pearls
Located in Hicksville, NY
Hakimoto Pink Pair of Botton Cultured Pearls 7.6 grams 14.5-14.4 mm Aproximat
Category

American Modern 20th Century Loose Gemstones

Materials

Cultured Pearl

1.05ct Fine Blue Spinel Marquise Cut Rare Gemstone 9.6x4.4mm Loose Rare Gem
Located in Birmingham, GB
1.05ct Fine Blue Spinel Marquise Cut Rare Gemstone 9.6x4.4mm Loose Rare Gem Fine Natural Vivid Blue Spinel Gemstone. 1.05 Carat spinel with a fine vivid blue colour and good clarity...
Category

20th Century Loose Gemstones

Materials

Spinel

GIA Certified Round Brilliant Loose Diamond 1.01ct
Located in Laguna Beach, CA
GIA Certified Round Brilliant Loose Diamond. 1.01 carat round brilliant cut diamond. GIA graded F color, Si2 clarity. The GIA grading report number is 2235411157. Comes with a full G...
Category

20th Century Loose Gemstones

Materials

Diamond

Old Europoean Diaomds 8.24ct Total Weight Matching Pair
Located in Ramat Gan, IL
Matching Pair of 4ct Each Old European Diamonds** Discover the timeless elegance of this **matching pair of 4-carat each Old European cut diamonds**—an extraordinary find for collec...
Category

20th Century Loose Gemstones

Materials

Diamond

5.40 Carat Radiant Cut G-VS2 Diamond Platinum Eternity Band Ring
Located in New York, NY
Title: 5.40 Carat Radiant Cut G-VS2 Diamond Platinum Eternity Band Ring Style: Eternity Band Metal: Platinum Gemstone 1: 4.5 Carat Diamond Number of Stones: 18 Shape: Radiant Cut Siz...
Category

20th Century Loose Gemstones

Materials

Diamond

AJD 8.7Ct Brazilian Violet/Pink Cabochon Teardrop Tourmaline
Located in Raleigh, NC
Brazilian Tourmaline 8.7Ct lovely color translucent teardrop shape cabochon
Category

Brazilian Artisan 20th Century Loose Gemstones

Materials

Tourmaline

0.73ct Deep Blue Natural Sapphire Oval Loose Cut Gemstone VS
Located in Birmingham, GB
0.73ct Deep Blue Natural Sapphire Oval Loose Cut Gemstone 5.8x4.8mm VS Natural Green Blue Sapphire Gemstone. 0.73 Carat with a beautiful deep blue colour and good clarity, a clean s...
Category

20th Century Loose Gemstones

Materials

Sapphire, Blue Sapphire

Magnificent Australian Loose Black Boulder Opal of 5.50ct. 19mm x 12mm x 4mm.
Located in MELBOURNE, AU
This Australian Loose Boulder Opal is of impressive 5.50ct (19mm x 12mm x 4mm) from Winton, Queensland displaying the superb & truly unique spectrum of colours: from striking Indigo & Sky Blue to superb vivid Emerald Green The beauty of this spectacular opal is truly dazzling, particularly under different lightings: the gem displays the most magnificent spectrum The gem can be set in precious metals & turned into a piece of jewelry (pendant for example) - please message us for details! Australian Boulder opal is the second most valuable type of opal. Mined from the large ironstone boulders under the ground, boulder opals are easily recognisable by the layer of solid brown ironstone...
Category

Australian Vintage 20th Century Loose Gemstones

Materials

Opal

Diamond clarity:(IF) internally flawless color: top wesselton 1.06ct
Located in Berlin, BE
diamond, a Brilliant cut gem with a weight of 1.06 carats. extraordinary qualities that define its exquisite beauty: Diamond Details: Shape: Brilliant Weight: 1.06 carats Clarity Grade: Internally Flawless...
Category

German Aesthetic Movement Vintage 20th Century Loose Gemstones

Materials

Diamond

1.12 Carat Loose Diamond, Cushion Cut GIA Graded I1 L Solitaire
Located in Greensboro, NC
Shape/Cut: Cushion Clarity: I1 Color: L Dimensions (mm): 5.84 x 5.62 x 3.88 Weight: 1.12ct GIA Report Number: 2193793328 Please check out the enlarged pictures. Thank you for...
Category

Unknown 20th Century Loose Gemstones

Materials

Diamond

17.86 Carat Loose Tourmaline Gemstone, Genuine Green Rectangular
Located in Greensboro, NC
This gemstone has lovely green color and an attractive rectangular cut. It would make a most excellent addition to a collection or jewelry mount! Please check out our enlarged photog...
Category

Unknown 20th Century Loose Gemstones

Materials

Tourmaline

8.05 Carat Round Brilliant O-I VS and Baguette Shape Diamond Platinum Pin
Located in New York, NY
Title: 8.05 Carat Round Brilliant O-I VS1-VS2 and Baguette Shape H VS1 Diamond Platinum Pin Metal: Platinum Gemstone 1: 1.05 Carat Diamond Number of Stones: 1 Color: O Clarity: VS1 S...
Category

20th Century Loose Gemstones

Materials

Diamond

Loose Tanzanite - 21.34 carats
Located in SYDNEY, AU
A loose emerald cut vivid blue tanzanite of 21.34cts. This stone is available to be set into the piece of your choice or kept to be admired on its own.
Category

Tanzanian 20th Century Loose Gemstones

Materials

Tanzanite

GIA Certified Round Brilliant Cut Loose Diamond 1.01 ct
Located in Laguna Beach, CA
Loose 1.01 carat round brilliant cut diamond. GIA graded G color, Si2 clarity, Very Good cut grade. Measures 6.55-6.63 x 3.90mm The GIA grading report number is 5221756497. Faces up ...
Category

20th Century Loose Gemstones

Materials

Diamond

GIA Certified Round Transition Cut Loose Diamond 1.36ct
Located in Laguna Beach, CA
1.36 carat round, transition cut diamond. GIA graded L color, I1 clarity. Natural clarity flaws can only be seen with magnification. The diamond is very attractive. The diamond has w...
Category

20th Century Loose Gemstones

Materials

Diamond

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