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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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1.35ct Green Tourmaline, Emerald Cut, VVS-VS

1.35ct Green Tourmaline, Emerald Cut, VVS-VS

6.1 x 5.5 mm

$ 67.23

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0.53ct Yellow Color-Change Diaspore, Oval, VVS-VS

0.53ct Yellow Color-Change Diaspore, Oval, VVS-VS

5.5 x 4.2 mm

$ 27.98

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113.40ct Green Bloodstone, Square, Opaque

113.40ct Green Bloodstone, Square, Opaque

31.1 x 30.5 mm

$ 39.53

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1.56ctw Multicolor Andalusite, Oval, VS

1.56ctw Multicolor Andalusite, Oval, VS

5.1 x 3.1 mm

$ 83.35

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3.35ctw Orange Hessonite Garnet, Emerald Cut, VS

3.35ctw Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 66.07

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19.07ct White Howlite, Pear Shape, Opaque

19.07ct White Howlite, Pear Shape, Opaque

26.1 x 16.4 mm

$ 8.92

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39.86ct Multicolor Jasper, Fancy, Translucent

39.86ct Multicolor Jasper, Fancy, Translucent

47.3 x 25.6 mm

$ 31.44

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2.20ct Green Peridot, Oval, VS
Peridot Product Video (438077)

2.20ct Green Peridot, Oval, VS

8.5 x 6.8 mm

$ 76.69

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1.83ct Orange Hessonite Garnet, Emerald Cut, VS

1.83ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 36.09

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2.51ctw Green Prehnite, Oval, Transparent

2.51ctw Green Prehnite, Oval, Transparent

7.1 x 5.4 mm

$ 27.50

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39.59ct Multicolor Jasper, Baguette, Opaque

39.59ct Multicolor Jasper, Baguette, Opaque

25.8 x 20.4 mm

$ 24.29

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2.42ctw Yellow Citrine, Round, VVS-VS

2.42ctw Yellow Citrine, Round, VVS-VS

7 mm (calibrated)

$ 16.07

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2.41ct Yellow Citrine, Oval, VVS

2.41ct Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 17.52

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3.38ct Yellow Citrine, Oval, VVS

3.38ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 23.56

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0.71ct Orange Fire Opal, Oval, Translucent

0.71ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 16.21

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1.22ct Orange Hessonite Garnet, Oval, VS

1.22ct Orange Hessonite Garnet, Oval, VS

8 x 6.5 mm

$ 18.63

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0.70ct Green Tourmaline, Baguette, VVS

0.70ct Green Tourmaline, Baguette, VVS

11.7 x 2.7 mm

$ 24.40

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4.97ct Multicolor Fire Agate, Fancy, Opaque

4.97ct Multicolor Fire Agate, Fancy, Opaque

13 x 10.6 mm

$ 42.42

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3.35ctw Red Pyrope Garnet, Square, VS

3.35ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 25.70

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8.19ctw Multicolor Labradorite, Round, Translucent

8.19ctw Multicolor Labradorite, Round, Translucent

12 mm (calibrated)

$ 17.94

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2.27ct Multicolor Spectrolite, Oval, Opaque

2.27ct Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 10.70

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0.40ct Yellow Color-Change Diaspore, Oval, VS

0.40ct Yellow Color-Change Diaspore, Oval, VS

4.7 x 3.8 mm

$ 21.12

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29.46ct Bi-Color Ametrine, Oval, VVS-VS

29.46ct Bi-Color Ametrine, Oval, VVS-VS

22.6 x 19.3 mm

$ 193.66

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1.12ctw Green Peridot, Oval, Transparent

1.12ctw Green Peridot, Oval, Transparent

6.1 x 4.2 mm

$ 9.82

View Gem
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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 -> 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

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 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 -> 10 star ratings

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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