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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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6.35ct Black Star Diopside, Oval, Opaque

6.35ct Black Star Diopside, Oval, Opaque

12 x 10 mm (calibrated)

$ 31.62

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0.93ctw Green Peridot, Oval, VS

0.93ctw Green Peridot, Oval, VS

6 x 4 mm (calibrated)

$ 10.19

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0.74ct Yellow Citrine, Heart, Transparent

0.74ct Yellow Citrine, Heart, Transparent

6 x 6 mm (calibrated)

$ 5.16

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17.39ct Multicolor Boulder Opal, Fancy, Translucent

17.39ct Multicolor Boulder Opal, Fancy, Translucent

23.5 x 16.7 mm

$ 72.17

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2.58ct Blue Chalcedony, Oval, Transparent

2.58ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 5.14

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2.28ct Turquoise Fluorite, Pear Shape, Transparent

2.28ct Turquoise Fluorite, Pear Shape, Transparent

9.6 x 7 mm

$ 9.08

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0.02ct Black Diamond, Round, Opaque

0.02ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 15.94

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2.51ctw Yellow Citrine, Round, VVS-VS

2.51ctw Yellow Citrine, Round, VVS-VS

7.5 mm (calibrated)

$ 16.67

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2.10ctw Red Pyrope Garnet, Marquise, VVS-VS

2.10ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5 mm

$ 18.41

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2.25ctw Yellow Color-Change Diaspore, Cushion, VVS

2.25ctw Yellow Color-Change Diaspore, Cushion, VVS

10.9 x 4 mm

$ 115.87

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1.32ct Red Pyrope Garnet, Marquise, VVS-VS

1.32ct Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5.2 mm

$ 11.57

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1.78ctw Orange Moonstone, Cushion, Translucent

1.78ctw Orange Moonstone, Cushion, Translucent

6 x 6 mm (calibrated)

$ 3.54

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24.18ct Multicolor Jasper, Pear Shape, Opaque

24.18ct Multicolor Jasper, Pear Shape, Opaque

27.9 x 17.9 mm

$ 13.49

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0.14ct Yellow Diamond, Round, VVS-VS
Diamond Product Video (564574)

0.14ct Yellow Diamond, Round, VVS-VS

3.2 mm

$ 232.35

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1.31ct Gray Sillimanite Cat'S Eye, Oval, Translucent

1.31ct Gray Sillimanite Cat'S Eye, Oval, Translucent

7.5 x 4.5 mm

$ 3.92

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1.27ct Green Tourmaline, Emerald Cut, VS

1.27ct Green Tourmaline, Emerald Cut, VS

13.7 x 3.4 mm

$ 33.40

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11.90ct Yellow Citrine, Oval, VS

11.90ct Yellow Citrine, Oval, VS

15.7 x 13.1 mm

$ 79.02

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1.05ct White Sillimanite Cat'S Eye, Oval, Transparent

1.05ct White Sillimanite Cat'S Eye, Oval, Transparent

6 x 6 mm (calibrated)

$ 4.03

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0.53ct Pink Morganite, Oval, VS

0.53ct Pink Morganite, Oval, VS

6.4 x 4.5 mm

$ 23.75

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4.59ct Brown Tiger'S Eye, Oval, Opaque

4.59ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 2.70

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2.39ctw White Rainbow Moonstone, Oval, Transparent

2.39ctw White Rainbow Moonstone, Oval, Transparent

6.9 x 6 mm

$ 78.58

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2.84ct Orange Hessonite Garnet, Oval, VS

2.84ct Orange Hessonite Garnet, Oval, VS

9.6 x 7.8 mm

$ 50.53

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2.00ct Yellow Citrine, Pear Shape, VVS-VS

2.00ct Yellow Citrine, Pear Shape, VVS-VS

10.4 x 7.3 mm

$ 15.34

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0.58ct Yellow Citrine, Trillion, VVS-VS

0.58ct Yellow Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 4.81

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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 website was very easy to use.

Posted By Garnet in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and functional

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