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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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1.03ctw Green Peridot, Pear Shape, VVS-VS

1.03ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 7.90

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16.73ct Purple Ruby-Zoisite, Flower Cut, Opaque

16.73ct Purple Ruby-Zoisite, Flower Cut, Opaque

17.4 x 14.5 mm

$ 20.33

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0.85ct Orange Sphalerite, Round, VS-SI

0.85ct Orange Sphalerite, Round, VS-SI

5.5 mm (calibrated)

$ 42.33

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1.41ct Yellow Citrine, Emerald Cut, VVS-VS

1.41ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 11.24

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49.29ct Green Bloodstone, Marquise, Opaque

49.29ct Green Bloodstone, Marquise, Opaque

46.7 x 19.6 mm

$ 22.09

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2.83ct Brown Tiger'S Eye, Oval, Opaque

2.83ct Brown Tiger'S Eye, Oval, Opaque

9 x 7 mm (calibrated)

$ 2.82

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4.07ctw Pink Malaya Garnet, Round, VS
Malaya Garnet Product Video (355535)

4.07ctw Pink Malaya Garnet, Round, VS

5.5 mm (calibrated)

$ 160.52

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30.25ct Green Amazonite, Oval, Opaque

30.25ct Green Amazonite, Oval, Opaque

32.2 x 19.2 mm

$ 24.10

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3.76ct Pink Strawberry Quartz, Oval, Transparent

3.76ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 28.20

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2.68ct Pink Strawberry Quartz, Oval, Transparent

2.68ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 19.91

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0.60ct Yellow Zircon, Oval, VVS

0.60ct Yellow Zircon, Oval, VVS

5.2 x 4.1 mm

$ 14.94

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25.12ctw Multicolor Jasper, Fancy, Opaque

25.12ctw Multicolor Jasper, Fancy, Opaque

26.1 x 15.3 mm

$ 14.76

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1.92ct Pink Strawberry Quartz, Round, Translucent

1.92ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.72

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0.96ct Green Tourmaline, Round, Transparent

0.96ct Green Tourmaline, Round, Transparent

6 mm (calibrated)

$ 15.90

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2.26ct Green Tourmaline, Emerald Cut, VS

2.26ct Green Tourmaline, Emerald Cut, VS

7.3 x 7 mm

$ 112.55

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0.81ct Yellow Citrine, Marquise, VVS-VS

0.81ct Yellow Citrine, Marquise, VVS-VS

9.1 x 4.9 mm

$ 5.38

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7.34ctw Pink Strawberry Quartz, Round, Translucent
Strawberry Quartz Product Video (608484)

7.34ctw Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 112.59

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1.21ctw Brown Moonstone, Round, Translucent

1.21ctw Brown Moonstone, Round, Translucent

5 mm (calibrated)

$ 6.63

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82.30ct Multicolor Jasper, Oval, Opaque

82.30ct Multicolor Jasper, Oval, Opaque

46.7 x 28 mm

$ 47.54

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0.78ct Green Tourmaline, Emerald Cut, VVS

0.78ct Green Tourmaline, Emerald Cut, VVS

11 x 3.4 mm

$ 19.42

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2.25ct Yellow Sphene, Oval, Transparent

2.25ct Yellow Sphene, Oval, Transparent

7.6 x 6.8 mm

$ 11.21

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45.11ct Multicolor Jasper, Fancy, Opaque

45.11ct Multicolor Jasper, Fancy, Opaque

30.6 x 24.6 mm

$ 59.30

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51.95ct Multicolor Ruby-Zoisite, Oval, Opaque

51.95ct Multicolor Ruby-Zoisite, Oval, Opaque

34.6 x 26.7 mm

$ 85.37

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14.26ct Multicolor Coral, Oval, Translucent

14.26ct Multicolor Coral, Oval, Translucent

25 x 17.2 mm

$ 44.22

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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 -> 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 -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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