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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 Price
Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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0.53ct White Rainbow Moonstone, Baguette, Transparent

0.53ct White Rainbow Moonstone, Baguette, Transparent

6 x 3.7 mm

$ 18.48

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3.14ctw White Rainbow Moonstone, Square, Transparent/Translucent
Rainbow Moonstone Product Video (350516)

3.14ctw White Rainbow Moonstone, Square, Transparent/Translucent

3.1 x 3.1 mm

$ 52.12

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0.02ct Black Diamond, Round, Opaque

0.02ct Black Diamond, Round, Opaque

1.9 mm (calibrated)

$ 15.94

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1.03ctw Violet Amethyst, Marquise, VVS-VS

1.03ctw Violet Amethyst, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 6.84

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8.43ct Green Prehnite, Fancy, Translucent

8.43ct Green Prehnite, Fancy, Translucent

16.2 x 10.6 mm

$ 13.84

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17.08ct Multicolor Jasper, Oval, Opaque

17.08ct Multicolor Jasper, Oval, Opaque

25 x 18 mm (calibrated)

$ 14.13

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0.74ct Orange Zircon, Oval, VVS

0.74ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 18.43

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3.49ct White Topaz, Oval, VVS

3.49ct White Topaz, Oval, VVS

10 x 8 mm (calibrated)

$ 24.34

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7.67ct Multicolor Quartz With Marcasite, Trillion, Transparent

7.67ct Multicolor Quartz With Marcasite, Trillion, Transparent

17.4 x 14.1 mm

$ 38.20

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0.81ct Yellow Beryl, Pear Shape, VVS

0.81ct Yellow Beryl, Pear Shape, VVS

8 x 6 mm (calibrated)

$ 17.75

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1.27ct Purple Spinel, Cushion, VVS

1.27ct Purple Spinel, Cushion, VVS

6.7 x 6.3 mm

$ 80.14

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2.46ct Yellow Citrine, Flower Cut, Transparent

2.46ct Yellow Citrine, Flower Cut, Transparent

9 x 9 mm (calibrated)

$ 18.87

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2.69ctw Brown Tiger'S Eye, Oval, Opaque

2.69ctw Brown Tiger'S Eye, Oval, Opaque

8 x 6 mm (calibrated)

$ 2.68

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15.13ct Green Bloodstone, Oval, Opaque

15.13ct Green Bloodstone, Oval, Opaque

17.8 x 14.6 mm

$ 22.61

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20.82ct Green Opal, Oval, Opaque

20.82ct Green Opal, Oval, Opaque

21 x 17 mm

$ 44.58

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0.91ct Green Chrome Diopside, Marquise, VS-SI

0.91ct Green Chrome Diopside, Marquise, VS-SI

10 x 5 mm (calibrated)

$ 22.66

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20.07ct Red Star Garnet, Oval, Opaque

20.07ct Red Star Garnet, Oval, Opaque

17.4 x 14.5 mm

$ 19.79

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2.12ct Orange Hessonite Garnet, Emerald Cut, SI

2.12ct Orange Hessonite Garnet, Emerald Cut, SI

8 x 8 mm (calibrated)

$ 35.40

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0.59ct Green Peridot, Emerald Cut, VS-SI

0.59ct Green Peridot, Emerald Cut, VS-SI

6 x 4 mm (calibrated)

$ 8.81

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1.64ct Multicolor Labradorite, Round, Translucent

1.64ct Multicolor Labradorite, Round, Translucent

7 mm (calibrated)

$ 3.53

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5.67ct Yellow Citrine, Marquise, VVS

5.67ct Yellow Citrine, Marquise, VVS

20 x 10 mm (calibrated)

$ 39.53

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1.46ct Pink Tourmaline, Round, Transparent

1.46ct Pink Tourmaline, Round, Transparent

7 mm (calibrated)

$ 25.03

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36.82ct Gray Jadeite, Oval, Opaque

36.82ct Gray Jadeite, Oval, Opaque

29.5 x 26.6 mm

$ 60.51

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2.92ctw Yellow Golden Beryl, Oval, VS

2.92ctw Yellow Golden Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 63.98

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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

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros 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
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