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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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1.95ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 57.75

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15.05ctw Yellow Citrine, Emerald Cut, VVS-VS

14 x 10 mm (calibrated)

$ 94.81

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0.80ct Yellow Color-Change Diaspore, Cushion, VVS-VS

5.5 x 5.4 mm

$ 28.05

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1.78ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 13.65

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21.03ct Red Pyrope Garnet, Oval, IF

16.1 x 14.6 mm

$ 698.20

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2.42ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.2 mm

$ 21.21

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29.11ct Brown Tiger'S Eye, Fancy, Opaque

38.1 x 9.7 mm

$ 2.90

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16.98ct Multicolor Pietersite, Trillion, Opaque

23 x 22 mm

$ 39.74

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2.31ct Green Sphene, Oval, Transparent

7.8 x 7.1 mm

$ 12.66

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2.48ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5 mm

$ 21.73

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1.72ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 13.19

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6.28ct Brown Smoky Quartz, Pear Shape, VS

15.1 x 10.9 mm

$ 20.63

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1.23ct Pink Rhodolite Garnet, Oval, VVS-VS

7.1 x 5.6 mm

$ 42.88

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5.48ct Multicolor Agate, Round, Opaque

11 mm (calibrated)

$ 9.28

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2.09ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.1 mm

$ 18.32

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1.22ct Violet Amethyst, Round, VS

7 mm (calibrated)

$ 8.02

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1.70ct Yellow Citrine, Round, VVS-VS

8 mm (calibrated)

$ 13.55

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1.26ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 18.73

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3.81ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 23.30

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2.17ct Green Peridot, Cushion, VS-SI

7.4 x 7.4 mm

$ 85.12

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42.85ct Multicolor Jasper, Oval, Opaque

34.5 x 23.4 mm

$ 26.75

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0.50ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

6.1 x 4.2 mm

$ 26.39

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1.89ct Pink Tourmaline, Round, Transparent

7 mm (calibrated)

$ 21.33

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3.05ctw Green Tsavorite Garnet, Marquise, VS

5.1 x 2.6 mm

$ 133.66

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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 can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
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Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
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Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
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Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
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Overall Rating -> 10 star ratings

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
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The website was very easy to use.

Posted By Garnet in January, 2026
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