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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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0.82ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

0.82ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

6 x 5 mm

$ 12.19

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8.08ct Brown Tiger'S Eye, Baguette, Opaque

8.08ct Brown Tiger'S Eye, Baguette, Opaque

14 x 10 mm (calibrated)

$ 8.05

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5.51ct Brown Smoky Quartz, Emerald Cut, VVS-VS

5.51ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 10.1 mm

$ 24.14

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1.46ct Orange Hessonite Garnet, Round, VS

1.46ct Orange Hessonite Garnet, Round, VS

6.5 mm (calibrated)

$ 27.19

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2.81ctw Red Pyrope Garnet, Square, VS

2.81ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 19.59

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3.43ct Yellow Citrine, Square, VVS-VS

3.43ct Yellow Citrine, Square, VVS-VS

8.7 x 8.6 mm

$ 26.30

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3.53ctw Orange Moonstone, Cushion, Translucent

3.53ctw Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 7.03

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1.66ct Purple Spinel, Cushion, VS

1.66ct Purple Spinel, Cushion, VS

7.1 x 5.6 mm

$ 115.74

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14.38ct Green Druzy Variscite, Fancy, Opaque

14.38ct Green Druzy Variscite, Fancy, Opaque

19.1 x 15.1 mm

$ 20.05

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2.74ct Violet Amethyst, Trillion, VS

2.74ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.83

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1.81ct Pink Malaya Garnet, Round, VS

1.81ct Pink Malaya Garnet, Round, VS

7.5 mm (calibrated)

$ 79.32

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1.35ct Green Tourmaline, Emerald Cut, VS

1.35ct Green Tourmaline, Emerald Cut, VS

9 x 4.7 mm

$ 67.23

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1.61ct White Sillimanite Cat'S Eye, Oval, Transparent

1.61ct White Sillimanite Cat'S Eye, Oval, Transparent

6.7 x 5.4 mm

$ 6.02

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3.00ct Violet Amethyst, Trillion, VVS-VS

3.00ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 20.92

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0.56ct Multicolor Opal, Pear Shape, Transparent

0.56ct Multicolor Opal, Pear Shape, Transparent

7 x 5 mm (calibrated)

$ 13.94

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67.17ct Multicolor Coral, Marquise, Opaque

67.17ct Multicolor Coral, Marquise, Opaque

64.2 x 22.8 mm

$ 98.61

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24.44ctw Multicolor Fossil Coral, Oval, Opaque

24.44ctw Multicolor Fossil Coral, Oval, Opaque

19.3 x 13.7 mm

$ 48.20

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3.30ct Brown Tiger'S Eye, Oval, Opaque

3.30ct Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 3.29

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0.80ct Orange Zircon, Oval, VVS

0.80ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 11.95

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1.79ct Pink Strawberry Quartz, Oval, Translucent

1.79ct Pink Strawberry Quartz, Oval, Translucent

9 x 7 mm (calibrated)

$ 13.73

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19.94ct Gray Hematite, Emerald Cut, Opaque

19.94ct Gray Hematite, Emerald Cut, Opaque

20.4 x 14.1 mm

$ 21.85

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1.14ctw Brown Smoky Quartz, Oval, Translucent

1.14ctw Brown Smoky Quartz, Oval, Translucent

6 x 4 mm (calibrated)

$ 4.24

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15.14ct Green Bloodstone, Pear Shape, Opaque

15.14ct Green Bloodstone, Pear Shape, Opaque

19.6 x 13.9 mm

$ 37.70

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5.65ctw Violet Amethyst, Oval, Transparent

5.65ctw Violet Amethyst, Oval, Transparent

10 x 8 mm (calibrated)

$ 30.96

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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

Fast and reliable service.

Posted By Zæck in December, 2025
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

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

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