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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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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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18.75ct Black Tourmaline, Oval, Opaque

17.6 x 15.2 mm

$ 93.38

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0.78ct Yellow Color-Change Diaspore, Cushion, VS

5.2 x 5.2 mm

$ 27.35

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1.96ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 33.60

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2.12ct Orange Hessonite Garnet, Oval, VS

8.5 x 7.1 mm

$ 32.39

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0.56ct Orange Spessartite Garnet, Oval, VS-SI

5.2 x 4.3 mm

$ 19.52

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3.74ct Violet Amethyst, Oval, Transparent/Translucent

10.6 x 8.8 mm

$ 28.68

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1.46ct Orange Hessonite Garnet, Cushion, VS-SI

6 x 6 mm (calibrated)

$ 24.00

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7.53ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 29.78

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10.93ct Green Prehnite, Fancy, Translucent

16.9 x 12.3 mm

$ 17.97

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12.25ct Multicolor Agate, Sphere / Ball, Opaque

12 mm (calibrated)

$ 9.76

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13.54ct Green Malachite, Baguette, Opaque

12.8 x 10.1 mm

$ 17.81

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1.59ct Purple Spinel, Cushion, VVS-VS

6.7 x 5.6 mm

$ 114.13

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16.82ct Multicolor Agate, Oval, Opaque

16 x 16 mm (calibrated)

$ 16.75

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2.80ctw Orange Hessonite Garnet, Square, VS-SI

6 x 6 mm (calibrated)

$ 61.35

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4.34ctw Yellow Golden Beryl, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 118.87

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0.17ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 308.86

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2.37ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 5.24

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58.14ct Violet Amethyst, Oval, VVS

30 x 22 mm (calibrated)

$ 482.56

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7.83ct Pink Morganite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 32.49

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1.11ct Yellow Color-Change Diaspore, Emerald Cut, VS

6.3 x 5 mm

$ 58.08

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3.81ct Yellow Citrine, Emerald Cut, VVS

11 x 9 mm (calibrated)

$ 29.22

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20.73ct Brown Tiger'S Eye, Oval, Opaque

24.7 x 16.6 mm

$ 45.43

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2.50ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8 x 6 mm (calibrated)

$ 49.30

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0.77ct Green Tourmaline, Baguette, VVS-VS

9.7 x 3.2 mm

$ 26.84

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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.

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