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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

Size Explained

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For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Brown Untreated Gemstones
Golden Untreated Gemstones
Gray Untreated Gemstones
Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
Purple Untreated Gemstones
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Turquoise Untreated Gemstones
Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
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10.15ct Multicolor Coral, Oval, Translucent

17.3 x 13.7 mm

$ 31.69

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55.78ctw Yellow Rutile Quartz, Sphere / Ball, Transparent

13 mm (calibrated)

$ 24.44

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5.60ct Green Druzy Variscite, Fancy, Opaque

16.7 x 12 mm

$ 26.44

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21.39ct Green Bloodstone, Oval, Opaque

20.9 x 14.4 mm

$ 31.96

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60.01ct White Dendritic Agate, Pear Shape, Opaque

40.8 x 33.9 mm

$ 29.89

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1.73ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 13.79

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36.77ct Gray Hematite, Oval, Opaque

23.1 x 16.7 mm

$ 35.86

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0.33ct Yellow Color-Change Diaspore, Oval, VS

4.4 x 3.7 mm

$ 17.42

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8.36ctw Yellow Citrine, Oval, VVS-VS

14.1 x 9.6 mm

$ 50.19

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7.63ct Violet Amethyst, Pear Shape, Transparent

17.3 x 11.4 mm

$ 45.60

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12.26ct White Rainbow Moonstone, Marquise, Transparent

24.6 x 10.9 mm

$ 97.69

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4.49ct Pink Morganite, Pear Shape, Transparent

15.1 x 9.1 mm

$ 49.19

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31.56ct Multicolor Jasper, Baguette, Opaque

25 x 18 mm (calibrated)

$ 19.36

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1.33ct Purple Spinel, Cushion, VS

7 x 5.7 mm

$ 92.03

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15.56ct Multicolor Jasper, Baguette, Opaque

16.6 x 12.8 mm

$ 9.55

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3.62ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.93

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1.12ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 35.24

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6.11ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 36.69

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11.05ctw Yellow Rutile Quartz, Round, Translucent

11 mm (calibrated)

$ 30.14

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18.19ct Violet Amethyst, Round, VS

18 mm (calibrated)

$ 126.82

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1.55ctw White Rainbow Moonstone, Oval, Transparent

7 x 5 mm (calibrated)

$ 26.24

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2.78ct Yellow Citrine, Flower Cut, Transparent

9 x 9 mm (calibrated)

$ 21.32

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1.20ct Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 31.87

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7.56ct Yellow Moonstone, Oval, Translucent

14 x 10 mm (calibrated)

$ 16.65

View Gem
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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 -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 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

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate
Enlarged Gemstone Image