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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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2.88ct Violet Amethyst, Pear Shape, VS

13 x 9 mm (calibrated)

$ 22.09

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1.30ct Purple Spinel, Cushion, VS-SI

6.7 x 5.9 mm

$ 130.66

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30.93ct Multicolor Jasper, Fancy, Opaque

32.7 x 19.1 mm

$ 41.00

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44.53ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

35.6 x 21.5 mm

$ 19.96

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1.88ct Green Tourmaline, Emerald Cut, VVS-VS

18.6 x 3.9 mm

$ 51.49

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3.87ct Violet Amethyst, Round, VVS

10 mm (calibrated)

$ 29.68

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4.39ct Pink Rose Quartz, Emerald Cut, Transparent

10 x 10 mm (calibrated)

$ 24.05

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2.36ct Yellow Rutile Quartz, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 6.37

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12.67ct Green Druzy Variscite, Fancy, Opaque

27 x 14.2 mm

$ 13.00

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7.70ct White Rainbow Moonstone, Pear Shape, Translucent

17 x 10.4 mm

$ 53.68

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2.37ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 88.52

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0.64ct Orange Fire Opal, Oval, Transparent

8 x 6 mm (calibrated)

$ 18.44

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1.56ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 38.84

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4.62ctw Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 9.20

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5.81ct White Topaz, Cushion, VVS-VS

12 x 10 mm (calibrated)

$ 38.58

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13.26ctw Multicolor Jasper, Pear Shape, Opaque

23.7 x 11.7 mm

$ 7.98

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43.95ct Multicolor Rainbow Moonstone, Fancy, Opaque

45.1 x 11.3 mm

$ 4.38

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0.71ct Yellow Citrine, Pear Shape, VS

7 x 5 mm (calibrated)

$ 3.54

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10.40ct Green Jadeite, Oval, Translucent

17.6 x 14 mm

$ 34.18

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2.16ctw Yellow Beryl, Trillion, VVS

8 x 8 mm (calibrated)

$ 43.03

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21.96ct Brown Jasper, Fancy, Opaque

40.4 x 12.4 mm

$ 33.67

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3.23ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 17.70

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2.19ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 35.49

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19.25ct Black Nuummite, Cushion, Opaque

21.3 x 15.5 mm

$ 80.57

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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

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 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 -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate

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

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate
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