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

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I had a great time searching all the lovely stones. This is my first precious loose stone purchase for my own work. I chose sapphire, and found some lovely briolettes. I wanted 3, but this set of 4 was perfect. Everything was quick and easy, and I'm excited.

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Overall Rating -> 10

I was looking for ammolite for my husband. Other websites are not always clear about whether they have genuine ammolite or simulated ammolite. I have purchased from GemSelect before and trust that the stones are genuine. Finding the stones I want is easy, and I love all of the search filter options!

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Gemstones A-Z

Buy Untreated Gemstones

7.97 ct Loose Princess Cut Sapphire, 2.9 x 2.8 mm From Tanzania

0.53 ct Pink Spinel, 5.3 x 4 mm Cushion Cut From Tanzania

58.57 ct Yellow Star Sapphire, 23.2 x 19.9 mm Oval Cut From Madagascar

15.53 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 27 x 12.4 mm

1.8 carat Blue Topaz, Emerald-Cut loose Topaz from Brazil, Natural Gem, 8 x 6.2 mm

6 ct Yellow Agate, 12.2 x 10.5 mm Oval Cut From India

1.9 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 8.1 x 6.2 mm

1.64 ct Loose Red Tourmaline, 8.3 x 6 mm Oval Cabochon From Mozambique

2.72 carat Pear Rutile Quartz, loose Certified Rutile Quartz from India, Natural Untreated Gem, 10.1 x 7.1 mm

9.46 ct Drilled Square Rondelle Labradorite, 5 x 4.8 mm From Madagascar

2.47 ct Oval Prehnite, 7 x 5.4 mm From South Africa

3.34 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 10.2 x 7.9 mm

23.44 carat Bi-color Ametrine, Cushion loose Ametrine from Brazil, Natural Untreated Gem, 22.6 x 12.2 mm

2.03 ct Yellow Sillimanite, 9.8 x 7.7 mm Oval Cut From Sri Lanka

16.54 carat Pear Howlite, loose Certified Howlite from the United States, Natural Untreated Gem, 22.2 x 18.2 mm

2.15 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 9.9 x 5 mm

46.91 ct Oval Rhodochrosite, 35.1 x 19.2 mm From South Africa

0.52 carat Purple Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 7.5 x 3.7 mm

2.81 carat Orange Hessonite Garnet, Square loose Hessonite Garnet from Madagascar, Natural Untreated Gems, 6 x 5.9 mm

0.67 carat Green Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 5.4 x 4.3 mm

0.73 ct Loose Yellow Sapphire, 6.1 x 5.2 mm Oval Cut From Tanzania

8.05 carat Swiss Blue Topaz, Carved Flower loose Topaz from Brazil, Natural Gem, 13.4 x 10.4 mm

5.56 ct Yellow Agate, 12.6 x 11.1 mm Oval Cut From India

2.08 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 9.2 x 8.9 mm

3.1 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10.1 x 10 mm

2.78 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 8.8 x 6.8 mm

7.17 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 13.6 x 12.2 mm

55.16 ct Druzy Citrine, 31.4 x 20.2 mm From Uruguay

1.22 ct Loose Yellow Sapphire, 6.2 x 5.3 mm Oval Cut From Tanzania

3.64 ct Round Checkerboard Smoky Quartz, 8 mm From Brazil

1.69 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 11.5 x 6.4 mm

29.49 ct Blue Sodalite, 40.7 x 19 mm Oval Cut From Australia

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