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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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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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1.68ct Violet Amethyst, Trillion, VS

1.68ct Violet Amethyst, Trillion, VS

9 x 9 mm (calibrated)

$ 12.89

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2.35ct Green Chrysoprase, Oval, Translucent

2.35ct Green Chrysoprase, Oval, Translucent

8.1 x 7.5 mm

$ 19.51

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3.66ct Multicolor Labradorite, Baguette, Translucent

3.66ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 5.03

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2.94ct Yellow Citrine, Oval, VS

2.94ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 18.37

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1.82ct Orange Moonstone, Marquise, Translucent

1.82ct Orange Moonstone, Marquise, Translucent

10 x 5 mm (calibrated)

$ 3.63

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15.40ct Multicolor Opal, Pear Shape, Transparent

15.40ct Multicolor Opal, Pear Shape, Transparent

20 x 20 mm (calibrated)

$ 383.46

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7.55ctw White Topaz, Emerald Cut, VVS

7.55ctw White Topaz, Emerald Cut, VVS

10 x 8 mm (calibrated)

$ 34.47

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3.49ctw Multicolor Andalusite, Round, VS

3.49ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 153.44

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5.45ct Black Star Diopside, Oval, Opaque

5.45ct Black Star Diopside, Oval, Opaque

12 x 10 mm (calibrated)

$ 27.14

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6.89ct Brown Smoky Quartz, Marquise, VVS

6.89ct Brown Smoky Quartz, Marquise, VVS

17.2 x 12 mm

$ 27.79

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 10.27

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5.65ct Yellow Citrine, Emerald Cut, VVS-VS

5.65ct Yellow Citrine, Emerald Cut, VVS-VS

11.3 x 9.7 mm

$ 43.33

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58.53ct Multicolor Tiger'S Eye Matrix, Trillion, Opaque

58.53ct Multicolor Tiger'S Eye Matrix, Trillion, Opaque

34.3 x 32 mm

$ 26.24

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2.86ct Violet Amethyst, Trillion, VVS-VS

2.86ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.94

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10.14ct Brown Smoky Quartz, Round, VVS

10.14ct Brown Smoky Quartz, Round, VVS

13 mm (calibrated)

$ 27.78

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1.90ct Blue Cavansite, Fancy, Opaque

1.90ct Blue Cavansite, Fancy, Opaque

9 x 9 mm (calibrated)

$ 11.04

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2.51ct Yellow Rutile Quartz, Pear Shape, Transparent

2.51ct Yellow Rutile Quartz, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 6.76

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3.51ct Yellow Citrine, Oval, VS

3.51ct Yellow Citrine, Oval, VS

11.2 x 8.6 mm

$ 21.26

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3.38ct Pink Strawberry Quartz, Oval, Transparent

3.38ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 25.35

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23.09ctw Multicolor Jasper, Fancy, Opaque

23.09ctw Multicolor Jasper, Fancy, Opaque

25.1 x 14.8 mm

$ 13.91

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10.15ct Multicolor Boulder Opal, Fancy, Opaque

10.15ct Multicolor Boulder Opal, Fancy, Opaque

18 x 13 mm (calibrated)

$ 70.77

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0.74ct Yellow Color-Change Diaspore, Cushion, VVS-VS

0.74ct Yellow Color-Change Diaspore, Cushion, VVS-VS

6.4 x 4.4 mm

$ 39.06

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33.07ct Green Bloodstone, Pear Shape, Opaque

33.07ct Green Bloodstone, Pear Shape, Opaque

35.9 x 25.6 mm

$ 15.15

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0.95ctw White Rainbow Moonstone, Oval, Transparent

0.95ctw White Rainbow Moonstone, Oval, Transparent

6 x 4 mm (calibrated)

$ 31.23

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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

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
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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
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Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

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
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