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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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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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2.33ct Orange Hessonite Garnet, Oval, VS-SI

2.33ct Orange Hessonite Garnet, Oval, VS-SI

9.8 x 7.3 mm

$ 45.95

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3.79ctw Yellow Sphene, Oval, Transparent

3.79ctw Yellow Sphene, Oval, Transparent

7.6 x 6.4 mm

$ 18.87

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0.73ct Orange Zircon, Oval, VVS-VS

0.73ct Orange Zircon, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 18.18

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1.10ct Green Tsavorite Garnet, Pear Shape, VS
Tsavorite Garnet Product Video (749863)

1.10ct Green Tsavorite Garnet, Pear Shape, VS

8.2 x 5.2 mm

$ 593.45

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8.00ct Black Nuummite, Oval, Opaque

8.00ct Black Nuummite, Oval, Opaque

14 x 12 mm (calibrated)

$ 35.30

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3.44ctw White Rainbow Moonstone, Square, Transparent

3.44ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 64.08

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13.42ct Pink Strawberry Quartz, Oval, Translucent

13.42ct Pink Strawberry Quartz, Oval, Translucent

16.7 x 14 mm

$ 102.92

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1.32ct Yellow Beryl, Trillion, VVS-VS

1.32ct Yellow Beryl, Trillion, VVS-VS

8 x 8 mm (calibrated)

$ 31.56

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6.76ct Pink Rose Quartz, Emerald Cut, Transparent

6.76ct Pink Rose Quartz, Emerald Cut, Transparent

11.6 x 11.4 mm

$ 37.03

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1.66ct Pink Morganite, Oval, VVS-VS

1.66ct Pink Morganite, Oval, VVS-VS

9.4 x 7.2 mm

$ 72.75

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2.70ctw Multicolor Opal, Round, Translucent

2.70ctw Multicolor Opal, Round, Translucent

6.5 mm (calibrated)

$ 63.04

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0.61ct Pink Tourmaline, Round, Transparent

0.61ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 24.30

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1.71ct Orange Sphalerite, Oval, VS-SI

1.71ct Orange Sphalerite, Oval, VS-SI

8.2 x 6.5 mm

$ 85.16

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0.92ct Yellow Color-Change Diaspore, Cushion, VS-SI

0.92ct Yellow Color-Change Diaspore, Cushion, VS-SI

7.1 x 5.5 mm

$ 32.98

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37.61ct Gray Jadeite, Oval, Opaque

37.61ct Gray Jadeite, Oval, Opaque

30 x 22 mm (calibrated)

$ 61.80

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5.15ct Green Prehnite, Fancy, Translucent

5.15ct Green Prehnite, Fancy, Translucent

16.3 x 10.7 mm

$ 8.46

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2.23ctw Orange Sunstone, Oval, Translucent

2.23ctw Orange Sunstone, Oval, Translucent

6 x 4 mm (calibrated)

$ 17.10

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1.98ct Green Tourmaline, Cushion, VVS-VS
Tourmaline Product Video (742805)

1.98ct Green Tourmaline, Cushion, VVS-VS

7.2 x 6.6 mm

$ 230.08

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25.80ct Violet Amethyst, Oval, IF

25.80ct Violet Amethyst, Oval, IF

19.5 x 15.9 mm

$ 197.86

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2.38ctw Red Pyrope Garnet, Marquise, VVS-VS

2.38ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.2 mm

$ 20.86

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3.89ct Multicolor Labradorite, Pear Shape, Translucent

3.89ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 8.61

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2.62ct Pink Morganite, Pear Shape, Translucent

2.62ct Pink Morganite, Pear Shape, Translucent

13.1 x 9.9 mm

$ 25.09

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1.21ct Purple Rhodolite Garnet, Pear Shape, VS

1.21ct Purple Rhodolite Garnet, Pear Shape, VS

7.7 x 5.4 mm

$ 42.18

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22.89ctw Multicolor Fossil Coral, Oval, Opaque

22.89ctw Multicolor Fossil Coral, Oval, Opaque

19.3 x 12.5 mm

$ 29.59

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

Very good and simple exchange

Posted By Waylon in March, 2026
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Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
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Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
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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 -> 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

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate
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