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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
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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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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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34.04ct White Dendritic Agate, Fancy, Opaque

34.04ct White Dendritic Agate, Fancy, Opaque

33.5 x 20.8 mm

$ 23.74

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35.66ctw Gray Hematite, Marquise, Opaque

35.66ctw Gray Hematite, Marquise, Opaque

27.6 x 12.1 mm

$ 34.77

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.

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

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
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

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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