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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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8.21ct Green Opal, Oval, Opaque

8.21ct Green Opal, Oval, Opaque

18.5 x 12.5 mm

$ 17.58

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1.54ct Yellow Beryl, Oval, VVS-VS

1.54ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 30.68

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7.45ct Black Cat'S Eye Scapolite, Oval, Translucent

7.45ct Black Cat'S Eye Scapolite, Oval, Translucent

12.6 x 10.1 mm

$ 40.82

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0.78ct Multicolor Labradorite, Pear Shape, Translucent

0.78ct Multicolor Labradorite, Pear Shape, Translucent

6.2 x 4.2 mm

$ 1.73

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1.67ctw Green Chrome Diopside, Marquise, VS
Chrome Diopside Product Video (724783)

1.67ctw Green Chrome Diopside, Marquise, VS

10 x 5 mm (calibrated)

$ 41.58

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8.43ct White Quartz Cat'S Eye, Round, Transparent

8.43ct White Quartz Cat'S Eye, Round, Transparent

13 mm (calibrated)

$ 29.92

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3.22ctw White Rainbow Moonstone, Square, Transparent/Translucent

3.22ctw White Rainbow Moonstone, Square, Transparent/Translucent

3.1 x 3.1 mm

$ 58.80

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1.68ctw Red Pyrope Garnet, Pear Shape, VVS-VS

1.68ctw Red Pyrope Garnet, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 10.04

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4.26ct Green Prehnite, Pear Shape, Transparent/Translucent

4.26ct Green Prehnite, Pear Shape, Transparent/Translucent

12 x 8 mm (calibrated)

$ 9.33

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1.57ct Purple Tourmaline, Oval, Transparent

1.57ct Purple Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 51.60

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2.80ctw Red Pyrope Garnet, Square, VS

2.80ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 21.47

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16.65ct Green Druzy Variscite, Fancy, Opaque

16.65ct Green Druzy Variscite, Fancy, Opaque

25.1 x 15.2 mm

$ 70.65

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6.16ct Multicolor Pietersite, Oval, Opaque

6.16ct Multicolor Pietersite, Oval, Opaque

15.5 x 11.4 mm

$ 12.12

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8.02ct Turquoise Grandidierite, Oval, Translucent
Grandidierite Product Video (614328)

8.02ct Turquoise Grandidierite, Oval, Translucent

14.7 x 10.9 mm

$ 230.92

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51.51ct Multicolor Chrysocolla, Pear Shape, Opaque
Chrysocolla Product Video (648156)

51.51ct Multicolor Chrysocolla, Pear Shape, Opaque

41.1 x 31.1 mm

$ 84.65

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11.90ct Yellow Citrine, Oval, VS

11.90ct Yellow Citrine, Oval, VS

15.7 x 13.1 mm

$ 79.02

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0.98ct Gray Sillimanite Cat'S Eye, Oval, Transparent

0.98ct Gray Sillimanite Cat'S Eye, Oval, Transparent

6.3 x 5.2 mm

$ 3.22

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13.26ct Red Star Garnet, Oval, Opaque

13.26ct Red Star Garnet, Oval, Opaque

13.4 x 11.5 mm

$ 13.08

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0.83ct Green Sphene, Oval, VS-SI

0.83ct Green Sphene, Oval, VS-SI

6.4 x 4.9 mm

$ 50.02

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4.53ctw Red Pyrope Garnet, Marquise, VVS-VS

4.53ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.1 mm

$ 39.70

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10.75ct Brown Smoky Quartz, Round, VVS-VS

10.75ct Brown Smoky Quartz, Round, VVS-VS

14 mm (calibrated)

$ 21.21

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30.85ct White Scolecite, Cushion, Opaque

30.85ct White Scolecite, Cushion, Opaque

28.5 x 24 mm

$ 33.81

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5.01ct Yellow Citrine, Oval, VVS-VS

5.01ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 30.08

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22.87ct Gray Hematite, Heart, Opaque

22.87ct Gray Hematite, Heart, Opaque

20.4 x 19.1 mm

$ 50.11

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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!

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It was easy to navigate

Posted By GemGod in July, 2025
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Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
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Love how easy the site is to use. Really love that the pictures are of actual product.

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Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
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Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
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Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
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