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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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For Example: 8-9
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0.58ct Orange Spessartite Garnet, Oval, VS

0.58ct Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 20.22

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14.65ctw Pink Coral, Flower Cut, Opaque
Coral Product Video (333649)

14.65ctw Pink Coral, Flower Cut, Opaque

15.3 x 11 mm

$ 176.56

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0.35ct Orange Spessartite Garnet, Oval, VS

0.35ct Orange Spessartite Garnet, Oval, VS

4.5 x 3.4 mm

$ 12.20

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8.60ct Pink Kunzite, Pear Shape, VVS
Kunzite Product Video (409121)

8.60ct Pink Kunzite, Pear Shape, VVS

13.8 x 9.7 mm

$ 242.91

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2.09ct Green Peridot, Cushion, VS

2.09ct Green Peridot, Cushion, VS

8.2 x 7.1 mm

$ 80.14

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5.96ctw Red Strawberry Quartz, Oval, Translucent

5.96ctw Red Strawberry Quartz, Oval, Translucent

11 x 9 mm (calibrated)

$ 46.55

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1.75ct Orange Hessonite Garnet, Oval, VS

1.75ct Orange Hessonite Garnet, Oval, VS

8.6 x 6.7 mm

$ 34.86

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29.20ct Multicolor Amethyst Geode Slice, Fancy, Transparent

29.20ct Multicolor Amethyst Geode Slice, Fancy, Transparent

27.3 x 23.9 mm

$ 31.12

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2.94ctw Orange Hessonite Garnet, Emerald Cut, VS

2.94ctw Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 57.98

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2.82ctw Purple Rhodolite Garnet, Oval, VVS-VS

2.82ctw Purple Rhodolite Garnet, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 61.79

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2.71ct Multicolor Labradorite, Baguette, Translucent

2.71ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 3.73

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1.55ctw Red Pyrope Garnet, Square, VS

1.55ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.89

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1.37ct Orange Zircon, Emerald Cut, VVS

1.37ct Orange Zircon, Emerald Cut, VVS

7 x 5 mm (calibrated)

$ 22.52

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0.57ct Pink Morganite, Pear Shape, VVS

0.57ct Pink Morganite, Pear Shape, VVS

8.7 x 4.3 mm

$ 34.35

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7.82ct Multicolor Cinnabar, Cushion, Opaque

7.82ct Multicolor Cinnabar, Cushion, Opaque

17.2 x 11.9 mm

$ 9.15

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15.65ct Multicolor Pietersite, Marquise, Opaque

15.65ct Multicolor Pietersite, Marquise, Opaque

34 x 14.6 mm

$ 36.64

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0.73ct Gray Sillimanite Cat'S Eye, Oval, Transparent

0.73ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.3 x 5.3 mm

$ 2.40

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1.10ct Green Tourmaline, Emerald Cut, VS

1.10ct Green Tourmaline, Emerald Cut, VS

13.3 x 3.4 mm

$ 24.10

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13.17ct Violet Amethyst, Cushion, VVS

13.17ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 104.94

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1.67ct Yellow Golden Beryl, Oval, VS

1.67ct Yellow Golden Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 40.25

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5.64ct Brown Tiger'S Eye, Oval, Opaque

5.64ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 5.62

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1.37ctw Multicolor Labradorite, Round, Translucent

1.37ctw Multicolor Labradorite, Round, Translucent

5 mm (calibrated)

$ 2.95

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0.99ctw Red Pyrope Garnet, Heart, VVS-VS

0.99ctw Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 24.65

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3.55ctw Multicolor Labradorite, Round, Translucent

3.55ctw Multicolor Labradorite, Round, Translucent

7.5 mm (calibrated)

$ 7.64

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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

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
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

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate

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 -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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