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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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2.02ct Green Tourmaline, Emerald Cut, VVS

2.02ct Green Tourmaline, Emerald Cut, VVS

26.8 x 3.3 mm

$ 50.30

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12.19ct White Rainbow Moonstone, Pear Shape, Transparent

12.19ct White Rainbow Moonstone, Pear Shape, Transparent

18 x 13 mm (calibrated)

$ 218.54

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1.48ct Violet Amethyst, Pear Shape, VVS-VS

1.48ct Violet Amethyst, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 10.32

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5.30ctw Yellow Citrine, Oval, VVS-VS

5.30ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 29.03

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1.58ct Orange Hessonite Garnet, Emerald Cut, SI

1.58ct Orange Hessonite Garnet, Emerald Cut, SI

7 x 5 mm (calibrated)

$ 31.16

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9.29ct Multicolor Coral, Round, Translucent

9.29ct Multicolor Coral, Round, Translucent

17 mm (calibrated)

$ 29.42

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1.52ct Yellow Citrine, Trillion, VVS-VS

1.52ct Yellow Citrine, Trillion, VVS-VS

8.5 x 8.4 mm

$ 9.41

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5.43ct Yellow Citrine, Oval, VVS-VS

5.43ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 32.61

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1.92ctw Purple Rhodolite Garnet, Oval, VS

1.92ctw Purple Rhodolite Garnet, Oval, VS

5.5 x 3.5 mm

$ 31.23

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23.68ct Multicolor Jasper, Oval, Opaque

23.68ct Multicolor Jasper, Oval, Opaque

27 x 20 mm (calibrated)

$ 18.87

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1.99ctw Yellow Citrine, Round, VS

1.99ctw Yellow Citrine, Round, VS

7 mm (calibrated)

$ 13.21

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2.13ctw Orange Zircon, Oval, VVS

2.13ctw Orange Zircon, Oval, VVS

6 x 4.8 mm

$ 53.04

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5.02ctw Yellow Citrine, Pear Shape, VS

5.02ctw Yellow Citrine, Pear Shape, VS

8 x 5 mm (calibrated)

$ 27.50

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34.77ct Brown Jasper, Fancy, Opaque

34.77ct Brown Jasper, Fancy, Opaque

37.5 x 11.2 mm

$ 6.92

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4.79ctw Green Peridot, Oval, VS

4.79ctw Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 52.48

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78.22ct Multicolor Jasper, Baguette, Opaque

78.22ct Multicolor Jasper, Baguette, Opaque

35.2 x 23.2 mm

$ 62.33

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17.74ct White Rainbow Moonstone, Pear Shape, Translucent

17.74ct White Rainbow Moonstone, Pear Shape, Translucent

22.4 x 15.1 mm

$ 123.69

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2.12ct Multicolor Spectrolite, Oval, Opaque

2.12ct Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 9.69

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1.38ct Green Tourmaline, Emerald Cut, VS-SI

1.38ct Green Tourmaline, Emerald Cut, VS-SI

11.9 x 3.8 mm

$ 45.36

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2.00ct Orange Hessonite Garnet, Oval, VS

2.00ct Orange Hessonite Garnet, Oval, VS

8.5 x 6.9 mm

$ 35.91

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16.08ct Multicolor Jasper, Oval, Opaque

16.08ct Multicolor Jasper, Oval, Opaque

22.2 x 16.2 mm

$ 35.24

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1.02ct Multicolor Opal, Oval, Transparent

1.02ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 46.93

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6.82ct Yellow Citrine, Emerald Cut, VVS

6.82ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 52.30

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1.45ct Yellow Citrine, Emerald Cut, VVS

1.45ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 10.11

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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

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

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

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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