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Home Gemstones Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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5.97ct Pink Strawberry Quartz, Oval, Translucent

11.6 x 9.3 mm

$ 35.97

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2.80ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5 mm

$ 24.54

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2.05ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 76.57

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12.47ct Violet Amethyst, Round, VVS

16 mm (calibrated)

$ 86.94

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2.70ct Green Tourmaline, Emerald Cut, VVS-VS

15.8 x 4.6 mm

$ 107.57

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4.20ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 27.61

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1.14ct Green Tourmaline, Baguette, VVS-VS

18.7 x 2.7 mm

$ 39.74

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0.50ct Yellow Beryl, Pear Shape, VS

6.9 x 4.7 mm

$ 11.95

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1.16ct White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 38.14

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3.04ct Pink Strawberry Quartz, Round, Translucent

9 mm (calibrated)

$ 18.58

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3.54ctw Purple Rhodolite Garnet, Oval, VS

5 x 3 mm (calibrated)

$ 38.28

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1.02ctw Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 25.40

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8.27ct Yellow Rutile Quartz, Pear Shape, Transparent

17 x 12.8 mm

$ 22.47

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0.84ct Pink Morganite, Pear Shape, VVS-VS

8 x 6 mm (calibrated)

$ 34.86

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12.81ct White Rainbow Moonstone, Baguette, Transparent

19.2 x 10.2 mm

$ 102.07

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7.30ct Multicolor Boulder Opal, Pear Shape, Opaque

15 x 9.5 mm

$ 50.90

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2.23ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 17.10

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1.80ct Violet Amethyst, Emerald Cut, VVS-VS

9 x 7 mm (calibrated)

$ 13.80

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1.99ct Orange Hessonite Garnet, Oval, VS

8.3 x 6.9 mm

$ 43.61

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0.97ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6 x 5.5 mm

$ 35.91

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2.83ct Orange Hessonite Garnet, Oval, VS-SI

9.3 x 7.6 mm

$ 51.66

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2.43ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 18.63

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7.89ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 43.23

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6.04ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 9.02

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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

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
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Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

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

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
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Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate
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