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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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3.52ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 26.99

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1.98ct Yellow Citrine, Cushion, VS

9 x 7 mm (calibrated)

$ 13.80

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10.38ct Multicolor Boulder Opal, Fancy, Opaque

17.8 x 13.6 mm

$ 43.08

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0.80ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 7.97

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8.13ct White Quartz Cat'S Eye, Round, Transparent

12 mm (calibrated)

$ 32.39

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2.58ctw Purple Rhodolite Garnet, Round, VS

5 mm (calibrated)

$ 56.53

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4.26ct Pink Rose Quartz, Square, Transparent

9.5 x 9.5 mm

$ 21.21

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1.85ct Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 27.51

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15.46ct Violet Amethyst, Flower Cut, Translucent

16.2 x 15.2 mm

$ 50.81

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42.75ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

39.2 x 21.2 mm

$ 24.70

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2.88ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 20.01

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1.08ct White Sillimanite Cat'S Eye, Oval, Transparent

5.9 x 5.5 mm

$ 4.30

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2.45ct Orange Moonstone, Marquise, Translucent

14 x 7 mm (calibrated)

$ 4.88

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2.14ct Yellow Apatite, Emerald Cut, VVS-VS

7.6 x 7.3 mm

$ 87.61

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1.48ct Multicolor Opal, Pear Shape, Translucent

10.4 x 7.3 mm

$ 56.76

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3.02ct Yellow Citrine, Square, VVS-VS

9 x 9 mm (calibrated)

$ 16.54

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14.79ct Green Jadeite, Oval, Translucent

19.4 x 16.1 mm

$ 32.41

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3.40ct Orange Sunstone, Oval, Translucent

11 x 9 mm (calibrated)

$ 52.15

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4.04ctw Yellow Sillimanite, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 154.92

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1.16ct Brown Kornerupine, Oval, VVS

7.5 x 6 mm

$ 63.54

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23.16ct Multicolor Feather Pyrite, Oval, Opaque

25 x 18 mm (calibrated)

$ 18.07

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25.45ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 177.44

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0.60ct Orange Zircon, Oval, VVS-VS

5.3 x 4.1 mm

$ 14.94

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1.42ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 10.89

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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

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 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

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate
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