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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
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Untreated Gemstones Treatment

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Orange Untreated Gemstones
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1.39ct Pink Tourmaline, Emerald Cut, VS

1.39ct Pink Tourmaline, Emerald Cut, VS

6.6 x 5.6 mm

$ 100.50

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2.12ctw Multicolor Andalusite, Oval, VS

2.12ctw Multicolor Andalusite, Oval, VS

6 x 4 mm (calibrated)

$ 113.68

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18.45ct Multicolor Bloodstone, Oval, Opaque

18.45ct Multicolor Bloodstone, Oval, Opaque

28.8 x 17 mm

$ 8.27

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1.43ct Orange Hessonite Garnet, Square, VS-SI

1.43ct Orange Hessonite Garnet, Square, VS-SI

6.1 x 5.7 mm

$ 23.99

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1.69ct White Rainbow Moonstone, Cushion, VVS

1.69ct White Rainbow Moonstone, Cushion, VVS

8.4 x 6.7 mm

$ 176.43

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53.06ct Multicolor Moss Agate, Oval, Translucent

53.06ct Multicolor Moss Agate, Oval, Translucent

38.3 x 29.3 mm

$ 44.04

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0.95ct Yellow Citrine, Marquise, VS

0.95ct Yellow Citrine, Marquise, VS

9.2 x 5.1 mm

$ 7.57

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8.04ct Pink Rose Quartz, Flower Cut, Transparent/Translucent

8.04ct Pink Rose Quartz, Flower Cut, Transparent/Translucent

12.7 x 12.4 mm

$ 26.43

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1.91ct Orange Sunstone, Oval, Translucent

1.91ct Orange Sunstone, Oval, Translucent

9.2 x 7.4 mm

$ 11.41

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12.53ct Brown Smoky Quartz, Emerald Cut, VVS

12.53ct Brown Smoky Quartz, Emerald Cut, VVS

13 x 13 mm (calibrated)

$ 24.57

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29.35ct Black Feather Pyrite, Oval, Opaque

29.35ct Black Feather Pyrite, Oval, Opaque

28 x 20 mm

$ 22.90

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3.20ct Yellow Beryl, Oval, VVS-VS

3.20ct Yellow Beryl, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 70.12

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1.99ct Orange Hessonite Garnet, Oval, VS

1.99ct Orange Hessonite Garnet, Oval, VS

8.1 x 6.7 mm

$ 34.73

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3.03ct Purple Kunzite, Cushion, VVS
Kunzite Product Video (691182)

3.03ct Purple Kunzite, Cushion, VVS

8.7 x 8 mm

$ 83.38

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1.78ct Red Pyrope Garnet, Heart, VVS

1.78ct Red Pyrope Garnet, Heart, VVS

8 x 8 mm (calibrated)

$ 46.10

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21.40ct Green Uvarovite Garnet Drusy, Fancy, Opaque

21.40ct Green Uvarovite Garnet Drusy, Fancy, Opaque

23.1 x 15.2 mm

$ 31.97

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27.98ct Multicolor Tiger'S Eye Matrix, Cushion, Opaque

27.98ct Multicolor Tiger'S Eye Matrix, Cushion, Opaque

18.9 x 16.5 mm

$ 27.87

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10.44ct Brown Tiger'S Eye, Oval, Opaque

10.44ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 10.40

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9.17ctw Violet Amethyst, Oval, Transparent

9.17ctw Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 50.24

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0.29ct Violet Iolite, Emerald Cut, VS

0.29ct Violet Iolite, Emerald Cut, VS

5 x 3 mm (calibrated)

$ 11.55

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2.55ctw Violet Amethyst, Oval, VVS-VS

2.55ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.98

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26.57ct White Rainbow Moonstone, Oval, Translucent

26.57ct White Rainbow Moonstone, Oval, Translucent

23.8 x 17.8 mm

$ 26.46

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66.10ct Violet Amethyst, Pear Shape, VVS-VS
Amethyst Product Video (724432)

66.10ct Violet Amethyst, Pear Shape, VVS-VS

33 x 24.3 mm

$ 495.08

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1.31ct Yellow Color-Change Diaspore, Cushion, VS

1.31ct Yellow Color-Change Diaspore, Cushion, VS

7 x 5.4 mm

$ 68.56

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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 -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate
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