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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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0.73ct Blue Kyanite, Round, SI

0.73ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 18.18

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0.53ct Yellow Color-Change Diaspore, Oval, VVS

0.53ct Yellow Color-Change Diaspore, Oval, VVS

5 x 4.4 mm

$ 27.98

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3.19ctw Orange Zircon, Emerald Cut, VS

3.19ctw Orange Zircon, Emerald Cut, VS

6.2 x 4.2 mm

$ 52.43

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6.25ct Pink Rose Quartz, Emerald Cut, Transparent

6.25ct Pink Rose Quartz, Emerald Cut, Transparent

11.5 x 11.4 mm

$ 34.25

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0.92ct Orange Hessonite Garnet, Emerald Cut, VS

0.92ct Orange Hessonite Garnet, Emerald Cut, VS

5.3 x 5.3 mm

$ 16.49

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21.84ct Multicolor Jasper, Oval, Opaque

21.84ct Multicolor Jasper, Oval, Opaque

27.6 x 19 mm

$ 18.06

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0.60ct Yellow Grossularite Garnet, Round, VS

0.60ct Yellow Grossularite Garnet, Round, VS

5 mm (calibrated)

$ 13.50

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18.82ct Black Nuummite, Oval, Opaque

18.82ct Black Nuummite, Oval, Opaque

24 x 14.7 mm

$ 77.23

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7.47ctw Multicolor Labradorite, Marquise, Translucent

7.47ctw Multicolor Labradorite, Marquise, Translucent

14 x 7 mm (calibrated)

$ 16.52

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0.52ct Purple Spinel, Cushion, VS

0.52ct Purple Spinel, Cushion, VS

4.5 x 4.4 mm

$ 36.25

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2.93ctw Red Pyrope Garnet, Square, VVS-VS

2.93ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 22.47

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8.24ctw Red Pyrope Garnet, Marquise, VVS-VS

8.24ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6.1 mm

$ 81.52

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2.27ct Yellow Citrine, Square, VVS

2.27ct Yellow Citrine, Square, VVS

7.7 x 7.6 mm

$ 13.28

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1.13ct Yellow Citrine, Round, VVS-VS

1.13ct Yellow Citrine, Round, VVS-VS

7 mm (calibrated)

$ 9.01

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0.27ct Orange Spessartite Garnet, Round, VS

0.27ct Orange Spessartite Garnet, Round, VS

3.5 mm (calibrated)

$ 9.41

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0.92ct Violet Amethyst, Marquise, VS

0.92ct Violet Amethyst, Marquise, VS

10 x 5 mm (calibrated)

$ 6.11

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0.26ct Orange Spessartite Garnet, Oval, VS

0.26ct Orange Spessartite Garnet, Oval, VS

3.9 x 3.3 mm

$ 9.06

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3.88ct Yellow Citrine, Briolette, VVS-VS

3.88ct Yellow Citrine, Briolette, VVS-VS

13.7 x 7.1 mm

$ 21.72

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0.18ctw White Diamond, Round, SI

0.18ctw White Diamond, Round, SI

2.8 mm (calibrated)

$ 143.42

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22.56ct Black Tourmaline, Cushion, Opaque

22.56ct Black Tourmaline, Cushion, Opaque

18.9 x 14.8 mm

$ 80.22

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5.04ct Pink Strawberry Quartz, Oval, Translucent

5.04ct Pink Strawberry Quartz, Oval, Translucent

11 x 9 mm (calibrated)

$ 32.21

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10.98ct Black Nuummite, Oval, Opaque

10.98ct Black Nuummite, Oval, Opaque

15.6 x 13.6 mm

$ 45.06

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1.80ct Pink Tourmaline, Cushion, VS

1.80ct Pink Tourmaline, Cushion, VS

8.9 x 6.6 mm

$ 268.92

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1.00ct Yellow Chrysoberyl, Oval, VVS
Chrysoberyl Product Video (367346)

1.00ct Yellow Chrysoberyl, Oval, VVS

7 x 5 mm (calibrated)

$ 115.83

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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 -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate
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