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Untreated Gemstones

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

Untreated Gemstones Weight
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63.72ct Brown Jasper, Oval, Opaque

63.72ct Brown Jasper, Oval, Opaque

35.1 x 26.3 mm

$ 32.82

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1.44ct Yellow Citrine, Emerald Cut, VVS

1.44ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 11.47

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53.73ct Violet Charoite, Fancy, Opaque
Charoite Product Video (343632)

53.73ct Violet Charoite, Fancy, Opaque

33.4 x 17.8 mm

$ 88.30

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5.47ct Yellow Rutile Quartz, Oval, Transparent

5.47ct Yellow Rutile Quartz, Oval, Transparent

13 x 9 mm (calibrated)

$ 14.99

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3.75ct Brown Rutile Quartz, Round, Transparent

3.75ct Brown Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 9.41

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11.58ct Multicolor Pietersite, Oval, Opaque

11.58ct Multicolor Pietersite, Oval, Opaque

21.1 x 11.9 mm

$ 43.72

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21.35ct Multicolor Jasper, Pear Shape, Opaque

21.35ct Multicolor Jasper, Pear Shape, Opaque

29.8 x 21 mm

$ 17.65

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0.97ct Yellow Tourmaline, Round, Transparent

0.97ct Yellow Tourmaline, Round, Transparent

6 mm (calibrated)

$ 16.28

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2.49ct Brown Rutile Quartz, Pear Shape, Transparent

2.49ct Brown Rutile Quartz, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 6.81

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2.06ct Brown Rutile Topaz, Trillion, Transparent

2.06ct Brown Rutile Topaz, Trillion, Transparent

9.1 x 8.2 mm

$ 42.75

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10.21ct Violet Amethyst, Oval, Transparent

10.21ct Violet Amethyst, Oval, Transparent

14.9 x 11.8 mm

$ 61.01

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11.42ct Multicolor Boulder Opal, Fancy, Transparent

11.42ct Multicolor Boulder Opal, Fancy, Transparent

21.7 x 18.6 mm

$ 56.87

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0.56ct Pink Spinel, Cushion, VS

0.56ct Pink Spinel, Cushion, VS

4.9 x 4.4 mm

$ 101.26

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16.29ctw Multicolor Coral, Fancy, Opaque
Coral Product Video (566487)

16.29ctw Multicolor Coral, Fancy, Opaque

17.6 x 11.4 mm

$ 30.88

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2.55ctw White Topaz, Cushion, VVS-VS

2.55ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 13.98

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12.74ct Green Amazonite, Oval, Opaque

12.74ct Green Amazonite, Oval, Opaque

23.9 x 14.7 mm

$ 12.94

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36.14ct Multicolor Jasper, Oval, Opaque

36.14ct Multicolor Jasper, Oval, Opaque

29.8 x 24.3 mm

$ 39.59

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1.71ct Orange Hessonite Garnet, Round, SI

1.71ct Orange Hessonite Garnet, Round, SI

7 mm (calibrated)

$ 31.86

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15.42ctw Multicolor Labradorite, Round, Translucent

15.42ctw Multicolor Labradorite, Round, Translucent

12 mm (calibrated)

$ 27.65

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6.32ct Violet Amethyst, Pear Shape, VVS-VS

6.32ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 48.46

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26.97ct Green Amazonite, Fancy, Opaque

26.97ct Green Amazonite, Fancy, Opaque

40.6 x 9.4 mm

$ 8.06

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0.83ct Yellow Beryl, Oval, VVS

0.83ct Yellow Beryl, Oval, VVS

7 x 5 mm (calibrated)

$ 16.53

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9.79ct Brown Smoky Quartz, Round, VVS

9.79ct Brown Smoky Quartz, Round, VVS

14 mm (calibrated)

$ 19.19

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1.43ct Orange Zircon, Pear Shape, VVS

1.43ct Orange Zircon, Pear Shape, VVS

8 x 6 mm (calibrated)

$ 34.80

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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.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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