Untreated Natural Gems: Authentic Genuine Gemstones GemSelect

The idea of treating gemstones is nothing new. Nowadays, gem treatments are a way to supply the global demand for colored gemstones with a very limited 'natural' supply. Many gem types are always, or almost always, treated. The most common gem treatment is heat treatment, which is routinely applied to ruby and sapphire. Other gems such as emerald, tanzanite, blue zircon and blue topaz, are generally treated to produce their distinctive color; in fact it's virtually impossible to buy blue topaz that has not been irradiated. Even for the most expert gem buyers, determining whether a gemstone has been treated or enhanced is not always easy, and usually requires much more than just a jeweler's loupe.

Even with advanced gemological equipment, many treatments are still almost impossible to detect. So for many gem and jewelry buyers, one of the best ways to ensure the gem they're acquiring is completely natural and untreated, is through the selective buying of gemstone varieties that for the most part are never enhanced in any way. If you're searching for untreated gemstones, you may be surprised to discover we carry over 100 different untreated gem types.

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Wonderful selection of gems to choose from. Have made many purchases and was only slightly disappointed once.

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making my own jewelry for my birth stone

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I enjoyed browsing though different varieties of rubies. I felt that the experience was simple and easy to navigate!

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My first order. I am anxious to see if what I ordered is what I receive.

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Overall Rating -> 9

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Gemstones A-Z

Buy Untreated Gemstones

0.28 ct Octagon Cut Iolite, 4.9 x 3 mm From Madagascar

0.89 carat Green Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 5.5 x 5.5 mm

1.37 carat Square Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 4.9 x 4.9 mm

0.3 ct Orange Sphalerite, 3.8 mm Round Cut From Spain

3.6 carat Sky Blue Topaz, Marquise Cut loose Topaz from Brazil, Natural Gems, 12.1 x 6.4 mm

6.08 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 16.2 x 11.9 mm

2.58 carat Square Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 5 x 4.9 mm

1.65 ct Loose Orange Hessonite Garnet, 7.8 x 6.5 mm Oval Cut From Madagascar

2.72 carat Brown Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 9.3 x 7.7 mm

2.99 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10 x 9.9 mm

2.54 carat Opal, loose Certified Opal from Ethiopia, Natural Gem, 11.9 x 8.6 mm

2.08 ct Oval Strawberry Quartz, 9.1 x 7.2 mm From Russia

13.28 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 25.4 x 13.4 mm

1.99 ct Round Spectrolite, 8.3 mm From Finland

1.26 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 6.9 x 5 mm

3.28 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Sri Lanka, Natural Untreated Gems, 7.9 x 6 mm

2.8 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 4.9 mm

27.96 ct Oval Tiger's Eye Matrix, 28.3 x 19.9 mm From Mexico

1.01 ct Blue Apatite, 4.8 x 4 mm Oval Cut From Madagascar

0.35 ct Orange Sphalerite, 3.9 mm Round Cut From Spain

9.25 ct Marquise Rainbow Moonstone, 23.7 x 10.8 mm From the United States

1.45 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.6 x 6.3 mm

2.08 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.2 x 7.7 mm

1.89 ct Blue Kyanite, 7.1 x 5.1 mm Oval Cut From Nepal

2.64 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.1 x 5.2 mm

1.1 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 6.6 x 4.8 mm

0.86 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 7.3 x 5.2 mm

1.35 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 15.7 x 3.4 mm

10.82 ct Oval Buff Top Chalcedony, 13.6 x 10.1 mm From Brazil

1.68 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7 x 5.1 mm

48.31 ct Cushion Chrysocolla, 29.4 x 26.6 mm From Australia

1.76 carat White Opal, Oval loose Opal from Australia, Natural Untreated Gem, 12.3 x 8.7 mm

Gemstone Information

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