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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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0.20ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 357.53

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2.95ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 23.51

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1.35ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 22.36

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2.01ct Yellow Zircon, Round, VVS-VS

7 mm (calibrated)

$ 55.06

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7.29ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 39.94

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6.64ct Brown Star Moonstone, Oval, Translucent

11.6 x 9.2 mm

$ 21.82

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1.16ct Purple Spinel, Cushion, VVS-VS

7 x 5 mm (calibrated)

$ 91.50

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44.95ct Multicolor Jasper, Oval, Opaque

38.3 x 24.6 mm

$ 24.63

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11.48ct Multicolor Amethyst Geode Slice, Fancy, Transparent

18.9 x 13.2 mm

$ 12.23

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9.61ct Violet Amethyst, Square, VVS-VS

14 x 14 mm (calibrated)

$ 73.70

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14.13ct Violet Amethyst, Oval, VS

19.1 x 14.7 mm

$ 98.51

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47.73ct White Rainbow Moonstone, Pear Shape, Translucent

35.9 x 23 mm

$ 332.77

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32.18ct Black Obsidian, Oval, Opaque

33.1 x 22.1 mm

$ 24.05

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1.14ct Green Tourmaline, Baguette, VS

7.8 x 3.9 mm

$ 39.74

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12.59ct Violet Amethyst, Round, VVS

15 mm (calibrated)

$ 87.78

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0.93ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 8.15

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11.81ct Multicolor Pietersite, Pear Shape, Opaque

22.8 x 15.4 mm

$ 28.93

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3.74ct Yellow Apatite, Emerald Cut, VS

9 x 9 mm (calibrated)

$ 153.13

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2.75ctw Orange Zircon, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 45.20

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36.88ct Green Aventurine, Fancy, Opaque

39.9 x 11.2 mm

$ 3.06

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0.86ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.99

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0.22ct Yellow Diamond, Round, VS

3.8 mm

$ 330.74

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0.97ct Red Spessartite Garnet, Briolette, VS-SI

5.7 x 4.2 mm

$ 33.18

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13.15ct White Rainbow Moonstone, Oval, Transparent

22.5 x 10.3 mm

$ 104.78

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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 was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 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

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate
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