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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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1.36ct Red Pyrope Garnet, Marquise, VVS-VS

1.36ct Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.2 mm

$ 11.92

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8.03ct Yellow Rutile Quartz, Pear Shape, Transparent

8.03ct Yellow Rutile Quartz, Pear Shape, Transparent

15 x 11 mm

$ 21.81

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34.86ct White Quartz, Oval, Transparent

34.86ct White Quartz, Oval, Transparent

27.1 x 22.5 mm

$ 38.20

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50.04ct Multicolor Jasper, Fancy, Opaque

50.04ct Multicolor Jasper, Fancy, Opaque

46.2 x 28.5 mm

$ 42.21

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2.40ct White Moonstone, Oval, Translucent

2.40ct White Moonstone, Oval, Translucent

9 x 7 mm (calibrated)

$ 21.03

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13.63ct Green Druzy Variscite, Fancy, Opaque

13.63ct Green Druzy Variscite, Fancy, Opaque

24.4 x 19.9 mm

$ 20.77

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11.80ct Yellow Citrine, Oval, VVS

11.80ct Yellow Citrine, Oval, VVS

18 x 13 mm (calibrated)

$ 64.64

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2.30ct Yellow Citrine, Cushion, VVS-VS

2.30ct Yellow Citrine, Cushion, VVS-VS

11.7 x 7.1 mm

$ 17.64

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1.94ct White Rainbow Moonstone, Cushion, VVS-VS

1.94ct White Rainbow Moonstone, Cushion, VVS-VS

7.5 x 7.2 mm

$ 202.53

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2.25ct Turquoise Grandidierite, Pear Shape, Translucent

2.25ct Turquoise Grandidierite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 123.26

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4.04ct Brown Tiger'S Eye, Oval, Opaque

4.04ct Brown Tiger'S Eye, Oval, Opaque

12.4 x 8.4 mm

$ 4.03

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1.82ct White Rainbow Moonstone, Oval, Transparent

1.82ct White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 30.98

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14.00ctw Black Spinel, Heart, Opaque

14.00ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 76.69

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1.57ct Brown Kornerupine, Pear Shape, VVS

1.57ct Brown Kornerupine, Pear Shape, VVS

9.2 x 6.5 mm

$ 130.31

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2.32ct Orange Sunstone, Round, Translucent

2.32ct Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 13.89

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1.06ctw Violet Amethyst, Marquise, VVS-VS

1.06ctw Violet Amethyst, Marquise, VVS-VS

8.1 x 4.2 mm

$ 7.04

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26.15ctw Multicolor Jasper, Pear Shape, Opaque

26.15ctw Multicolor Jasper, Pear Shape, Opaque

27.8 x 15.7 mm

$ 15.37

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1.07ct Yellow Zircon, Oval, VS

1.07ct Yellow Zircon, Oval, VS

6 x 4.9 mm

$ 15.99

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1.04ctw Green Peridot, Oval, Transparent

1.04ctw Green Peridot, Oval, Transparent

6 x 4 mm (calibrated)

$ 18.64

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2.07ctw Red Pyrope Garnet, Oval, VS

2.07ctw Red Pyrope Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 22.68

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2.04ctw Red Pyrope Garnet, Marquise, VVS-VS

2.04ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5 mm

$ 17.88

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2.70ctw Green Peridot, Oval, SI

2.70ctw Green Peridot, Oval, SI

8 x 6 mm (calibrated)

$ 29.58

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2.96ct Red Almandine Garnet, Pear Shape, VS

2.96ct Red Almandine Garnet, Pear Shape, VS

12 x 8 mm (calibrated)

$ 24.57

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20.39ct Gray Jadeite, Oval, Translucent

20.39ct Gray Jadeite, Oval, Translucent

19.1 x 17.7 mm

$ 24.35

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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 -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I've been looking for.

Posted By Tree Dog in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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