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Home › Gemstones › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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19.31ct Multicolor Rainbow Pyrite, Fancy, Opaque

19.31ct Multicolor Rainbow Pyrite, Fancy, Opaque

17.9 x 13.7 mm

$ 50.01

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38.39ctw Green Seraphinite, Sphere / Ball, Opaque
Seraphinite Product Video (447351)

38.39ctw Green Seraphinite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 57.35

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1.69ct Orange Sphalerite, Trillion, SI

1.69ct Orange Sphalerite, Trillion, SI

7.3 x 7.1 mm

$ 84.16

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11.78ctw Multicolor Tourmaline, Fancy, Transparent
Tourmaline Product Video (690541)

11.78ctw Multicolor Tourmaline, Fancy, Transparent

20.1 x 9.5 mm

$ 229.61

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0.31ct Green Kornerupine, Oval, VS-SI

0.31ct Green Kornerupine, Oval, VS-SI

4.7 x 3.7 mm

$ 26.55

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25.82ct Brown Rutile Quartz, Marquise, Transparent
Rutile Quartz Product Video (402579)

25.82ct Brown Rutile Quartz, Marquise, Transparent

31.1 x 13.8 mm

$ 90.80

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20.38ct Black Obsidian, Pear Shape, Opaque

20.38ct Black Obsidian, Pear Shape, Opaque

29.6 x 19.6 mm

$ 12.69

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7.49ct Yellow Rutile Quartz, Round, Transparent

7.49ct Yellow Rutile Quartz, Round, Transparent

13 mm (calibrated)

$ 32.83

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2.94ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.94ctw White Sillimanite Cat'S Eye, Oval, Translucent

7.7 x 5 mm

$ 11.65

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12.91ct Brown Smoky Quartz, Emerald Cut, VVS

12.91ct Brown Smoky Quartz, Emerald Cut, VVS

16 x 16 mm (calibrated)

$ 29.47

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7.65ct Blue Aquamarine, Emerald Cut, VS
Aquamarine Product Video (415530)

7.65ct Blue Aquamarine, Emerald Cut, VS

16 x 8.4 mm

$ 1,523.88

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60.46ct Multicolor Jasper, Oval, Opaque

60.46ct Multicolor Jasper, Oval, Opaque

35.2 x 23 mm

$ 42.39

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2.15ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.15ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 7 mm (calibrated)

$ 42.40

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1.08ct Purple Spinel, Pear Shape, VS

1.08ct Purple Spinel, Pear Shape, VS

8.2 x 5.5 mm

$ 100.90

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2.61ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

2.61ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

7.5 x 5.3 mm

$ 8.57

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20.59ct Multicolor Quartz With Marcasite, Round, Transparent
Quartz With Marcasite Product Video (523835)

20.59ct Multicolor Quartz With Marcasite, Round, Transparent

17 mm (calibrated)

$ 135.35

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1.18ct Yellow Color-Change Diaspore, Emerald Cut, VS

1.18ct Yellow Color-Change Diaspore, Emerald Cut, VS

6.2 x 5.3 mm

$ 55.13

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1.59ct Purple Sapphire, Cushion, VS
Sapphire Product Video (447674)

1.59ct Purple Sapphire, Cushion, VS

7.8 x 5.3 mm

$ 838.49

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39.63ctw Multicolor Tiger'S Eye Matrix, Sphere / Ball, Opaque

39.63ctw Multicolor Tiger'S Eye Matrix, Sphere / Ball, Opaque

14 mm (calibrated)

$ 62.96

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81.18ct Violet Amethyst, Oval, VVS-VS
Amethyst Product Video (639274)

81.18ct Violet Amethyst, Oval, VVS-VS

27.8 x 25.3 mm

$ 565.99

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1.17ct Violet Spinel, Cushion, VVS
Spinel Product Video (513401)

1.17ct Violet Spinel, Cushion, VVS

5.6 x 5.6 mm

$ 194.22

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3.26ct Yellow Cat'S Eye Opal, Oval, Opaque

3.26ct Yellow Cat'S Eye Opal, Oval, Opaque

11.6 x 6.8 mm

$ 9.74

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236.30ct Pink Star Rose Quartz, Oval, Transparent/Translucent
Star Rose Quartz Product Video (344438)

236.30ct Pink Star Rose Quartz, Oval, Transparent/Translucent

38.2 x 36.2 mm

$ 539.36

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2.06ctw White Sillimanite Cat'S Eye, Oval, Transparent

2.06ctw White Sillimanite Cat'S Eye, Oval, Transparent

7.3 x 5 mm

$ 6.49

View Gem
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Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

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