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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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3.50ctw Red Pyrope Garnet, Heart, VVS-VS

3.50ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 26.84

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0.96ct Green Tourmaline, Round, Transparent

0.96ct Green Tourmaline, Round, Transparent

6 mm (calibrated)

$ 15.90

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0.95ct Green Peridot, Oval, VS

0.95ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.62

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1.22ct Yellow Beryl, Oval, VVS-VS

1.22ct Yellow Beryl, Oval, VVS-VS

8.8 x 6.5 mm

$ 24.30

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17.99ct Multicolor Psilomelane Dendrite, Oval, Opaque

17.99ct Multicolor Psilomelane Dendrite, Oval, Opaque

26 x 16.8 mm

$ 14.51

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0.88ctw Yellow Citrine, Heart, VVS-VS

0.88ctw Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 7.01

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7.44ctw Violet Amethyst, Oval, Transparent

7.44ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 33.96

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0.34ctw Black Diamond, Square, Opaque
Diamond Product Video (678049)

0.34ctw Black Diamond, Square, Opaque

2.7 x 2.5 mm

$ 169.32

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19.55ct Multicolor Jasper, Oval, Opaque

19.55ct Multicolor Jasper, Oval, Opaque

20 x 15 mm (calibrated)

$ 12.46

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21.40ct Green Uvarovite Garnet Drusy, Fancy, Opaque

21.40ct Green Uvarovite Garnet Drusy, Fancy, Opaque

23.1 x 15.2 mm

$ 31.97

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1.58ct Multicolor Labradorite, Pear Shape, Translucent

1.58ct Multicolor Labradorite, Pear Shape, Translucent

9 x 6 mm (calibrated)

$ 3.49

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10.78ct Yellow Rutile Quartz, Pear Shape, Transparent

10.78ct Yellow Rutile Quartz, Pear Shape, Transparent

19.1 x 14.1 mm

$ 29.28

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1.56ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.56ct Gray Sillimanite Cat'S Eye, Oval, Transparent

6.8 x 6.2 mm

$ 4.88

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0.87ct Green Tourmaline, Baguette, VVS

0.87ct Green Tourmaline, Baguette, VVS

8.1 x 3.4 mm

$ 30.33

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5.01ctw Purple Rhodolite Garnet, Oval, VS
Rhodolite Garnet Product Video (500936)

5.01ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 106.53

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3.37ctw Yellow Citrine, Oval, VVS-VS

3.37ctw Yellow Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 25.85

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4.78ctw White Topaz, Cushion, VVS-VS

4.78ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 26.19

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1.40ct Purple Rhodolite Garnet, Oval, VS

1.40ct Purple Rhodolite Garnet, Oval, VS

7.6 x 5.9 mm

$ 57.43

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0.64ct Orange Spessartite Garnet, Oval, VS

0.64ct Orange Spessartite Garnet, Oval, VS

5.1 x 4.2 mm

$ 19.12

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9.73ct Green Prehnite, Fancy, Transparent

9.73ct Green Prehnite, Fancy, Transparent

16.2 x 14.3 mm

$ 13.55

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5.39ct Green Prehnite, Fancy, Translucent

5.39ct Green Prehnite, Fancy, Translucent

16.9 x 10.5 mm

$ 8.86

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15.21ct Multicolor Coral, Oval, Translucent

15.21ct Multicolor Coral, Oval, Translucent

23.9 x 18.9 mm

$ 47.50

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17.18ct Multicolor Boulder Opal, Fancy, Opaque

17.18ct Multicolor Boulder Opal, Fancy, Opaque

21.2 x 16.1 mm

$ 71.30

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16.61ct Green Prehnite, Fancy, Translucent

16.61ct Green Prehnite, Fancy, Translucent

19.5 x 13.5 mm

$ 27.30

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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

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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