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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
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1.93ctw Red Pyrope Garnet, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 16.73

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3.71ctw Red Pyrope Garnet, Square, VS

3.9 x 3.8 mm

$ 28.45

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5.16ct Brown Smoky Quartz, Round, VVS

10.5 mm

$ 14.13

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5.28ct Multicolor Rainbow Pyrite, Baguette, Opaque

14.4 x 9.6 mm

$ 13.63

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0.84ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 5.86

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62.45ct Violet Charoite, Oval, Opaque

40.8 x 29.5 mm

$ 102.64

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8.38ct Brown Smoky Quartz, Round, VVS-VS

14 mm (calibrated)

$ 13.78

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2.28ct Purple Rhodolite Garnet, Pear Shape, VS

9.5 x 7.2 mm

$ 61.12

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29.58ctw Multicolor Fossil Coral, Oval, Opaque

22.4 x 15.1 mm

$ 38.24

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1.69ct Purple Spinel, Cushion, VVS-VS

6.9 x 6.4 mm

$ 115.54

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4.12ct Yellow Citrine, Cushion, VVS-VS

12.2 x 8.4 mm

$ 31.59

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0.41ct Pink Morganite, Oval, VVS-VS

5.9 x 4.5 mm

$ 18.38

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12.25ct Brown Smoky Quartz, Emerald Cut, VVS

14 x 14 mm (calibrated)

$ 24.02

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10.75ct Brown Smoky Quartz, Round, VVS

14 mm (calibrated)

$ 20.02

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3.57ct Turquoise Grandidierite, Oval, VS-SI

11 x 9 mm (calibrated)

$ 156.46

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2.24ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.47

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1.10ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

7.6 x 4.2 mm

$ 59.06

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13.00ctw Green Prehnite, Fancy, Translucent

16.2 x 11.2 mm

$ 21.36

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1.47ct Orange Hessonite Garnet, Oval, VS

7.6 x 6.2 mm

$ 29.28

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4.75ctw Multicolor Labradorite, Round, Translucent

8 mm (calibrated)

$ 5.78

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1.64ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 71.87

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21.49ctw Multicolor Fossil Coral, Cushion, Opaque

17 x 13.2 mm

$ 46.62

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12.13ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 96.65

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0.27ct Violet Iolite, Marquise, VS

6 x 3 mm (calibrated)

$ 10.76

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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

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
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Overall Rating -> 10 star ratings

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
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Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
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Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
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Overall Rating -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate
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