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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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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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2.12ct Orange Coral, Oval, Opaque

10.9 x 5.4 mm

$ 348.40

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0.56ct Yellow Demantoid Garnet, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 153.38

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0.90ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 162.21

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23.80ct Orange Spessartite Garnet, Oval, SI

10 x 13.7 mm

$ 1,043.01

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0.60ct Green Demantoid Garnet, Oval, VS

6 x 4.2 mm

$ 164.34

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10.37ctw Brown Moonstone, Flower Cut, Translucent

12 x 12 mm (calibrated)

$ 45.45

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11.74ct Turquoise Grandidierite, Oval, Translucent

14 x 12 mm (calibrated)

$ 2,572.47

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1.19ct Purple Sapphire, Pear Shape, VS-SI

7.8 x 5.8 mm

$ 475.42

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18.83ct Blue Color-Change Fluorite, Oval, VS

20 x 15 mm (calibrated)

$ 431.18

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2.90ct Yellow Golden Beryl, Round, VS

10 mm (calibrated)

$ 63.54

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2.17ct Pink Kunzite, Pear Shape, VS

7.6 x 7.2 mm

$ 64.84

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81.18ct Violet Amethyst, Oval, VVS-VS

27.8 x 25.3 mm

$ 565.99

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4.44ct Multicolor Opal, Pear Shape, Transparent

13 x 13 mm (calibrated)

$ 92.13

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14.25ct Violet Charoite, Pear Shape, Opaque

21.8 x 16.2 mm

$ 48.69

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2.02ctw Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 35.04

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6.59ctw Blue Larimar, Oval, Opaque

11 x 9 mm (calibrated)

$ 65.00

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26.04ct Green Amazonite, Oval, Opaque

26.4 x 13.6 mm

$ 17.29

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63.97ct Multicolor Rhodochrosite, Oval, Opaque

39.9 x 25.6 mm

$ 109.33

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0.15ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 206.46

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23.18ct White Rainbow Moonstone, Square, Transparent

16 x 16 mm (calibrated)

$ 415.57

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13.00ct Multicolor Opal, Pear Shape, Opaque

19.4 x 13.6 mm

$ 27.84

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1.37ct Yellow Sillimanite, Oval, VS

8 x 6 mm (calibrated)

$ 52.54

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6.41ct Orange Star Moonstone, Oval, Translucent

12.3 x 11.5 mm

$ 28.09

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11.48ct Multicolor Quartz With Marcasite, Baguette, Transparent

16 x 12 mm (calibrated)

$ 62.89

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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

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate
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