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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
Untreated Gemstones Size
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Yellow Untreated Gemstones
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48.69ct Green Bloodstone, Oval, Opaque

27.9 x 21.1 mm

$ 72.75

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4.26ctw Red Pyrope Garnet, Square, VS

4.2 x 4.2 mm

$ 32.67

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3.09ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 23.16

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1.50ct Orange Hessonite Garnet, Oval, VS

8 x 6 mm (calibrated)

$ 29.88

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2.47ct Green Peridot, Cushion, VS

9 x 7.5 mm

$ 97.87

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2.06ct Green Sphene, Oval, Transparent

8.9 x 6.5 mm

$ 11.29

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1.18ct Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 22.53

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1.26ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 8.78

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5.76ct Multicolor Quartz With Marcasite, Round, Transparent

11 mm (calibrated)

$ 34.42

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0.76ct Yellow Color-Change Diaspore, Cushion, VS

6 x 4.9 mm

$ 29.14

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2.28ctw Red Pyrope Garnet, Emerald Cut, VS

5.8 x 3.7 mm

$ 17.49

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2.46ct Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 4.32

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0.67ct Brown Chocolate Opal, Oval, Opaque

7 x 5 mm (calibrated)

$ 20.02

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2.96ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 25.91

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0.02ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 13.28

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2.39ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8.1 x 6.6 mm

$ 39.43

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15.20ct Green Bloodstone, Oval, Opaque

20.1 x 16.3 mm

$ 22.71

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7.24ct Pink Morganite, Round, Translucent

12 mm (calibrated)

$ 78.53

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5.76ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 34.71

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4.95ctw Orange Hessonite Garnet, Cushion, VS-SI

8 x 8 mm (calibrated)

$ 81.36

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0.86ct White Sillimanite Cat'S Eye, Oval, Transparent

6.1 x 4.3 mm

$ 3.43

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2.66ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 19.76

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1.39ctw Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 19.38

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1.80ct Red Pyrope Garnet, Heart, VVS

8 x 8 mm (calibrated)

$ 46.61

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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!

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I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
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Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
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A pleasant experience and many choices to choose from

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