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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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Yellow Untreated Gemstones
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14.82ct Green Maw-Sit-Sit, Oval, Opaque

14.82ct Green Maw-Sit-Sit, Oval, Opaque

15.6 x 12.6 mm

$ 48.71

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15.48ct Green Bloodstone, Pear Shape, Opaque

15.48ct Green Bloodstone, Pear Shape, Opaque

28.8 x 16.5 mm

$ 6.94

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2.21ct Red Almandine Garnet, Oval, VS

2.21ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 82.54

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3.70ct Yellow Rutile Topaz, Cushion, Transparent

3.70ct Yellow Rutile Topaz, Cushion, Transparent

10 x 8 mm (calibrated)

$ 76.78

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0.35ct Yellow Citrine, Heart, VVS-VS

0.35ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 2.79

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1.36ct Brown Smoky Quartz, Baguette, VVS

1.36ct Brown Smoky Quartz, Baguette, VVS

9 x 6 mm (calibrated)

$ 9.48

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0.12ctw White Diamond, Marquise, VVS
Diamond Product Video (740693)

0.12ctw White Diamond, Marquise, VVS

4 x 1.9 mm

$ 417.08

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0.70ct Orange Sphalerite, Round, SI

0.70ct Orange Sphalerite, Round, SI

5 mm (calibrated)

$ 34.86

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7.50ct White Quartz, Round, VVS-VS

7.50ct White Quartz, Round, VVS-VS

13 mm (calibrated)

$ 13.15

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1.00ct Green Tourmaline, Emerald Cut, VS

1.00ct Green Tourmaline, Emerald Cut, VS

9.4 x 4.1 mm

$ 49.80

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6.72ctw Black Spinel, Round, Opaque

6.72ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 25.76

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0.69ct Pink Morganite, Pear Shape, VVS-VS

0.69ct Pink Morganite, Pear Shape, VVS-VS

8 x 5 mm (calibrated)

$ 41.58

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13.24ctw Black Star Diopside, Oval, Opaque

13.24ctw Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 54.95

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1.66ct Orange Hessonite Garnet, Oval, VS

1.66ct Orange Hessonite Garnet, Oval, VS

8.2 x 6.6 mm

$ 30.92

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0.84ct Multicolor Opal, Oval, Translucent

0.84ct Multicolor Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 27.61

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4.92ct Multicolor Pietersite, Oval, Opaque

4.92ct Multicolor Pietersite, Oval, Opaque

14 x 10 mm (calibrated)

$ 11.61

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0.73ct Yellow Citrine, Heart, VVS-VS

0.73ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 5.82

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1.44ct Orange Sphalerite, Oval, SI

1.44ct Orange Sphalerite, Oval, SI

6.7 x 5.7 mm

$ 71.71

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0.93ct Yellow Citrine, Trillion, VVS-VS

0.93ct Yellow Citrine, Trillion, VVS-VS

7 x 7 mm (calibrated)

$ 7.41

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3.16ctw Yellow Golden Beryl, Oval, VS

3.16ctw Yellow Golden Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 76.16

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1.46ct Multicolor Opal, Oval, Translucent

1.46ct Multicolor Opal, Oval, Translucent

11.3 x 7.8 mm

$ 71.98

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2.48ct Yellow Citrine, Oval, VVS

2.48ct Yellow Citrine, Oval, VVS

10.5 x 7.3 mm

$ 15.02

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1.98ctw Green Tsavorite Garnet, Baguette, VS

1.98ctw Green Tsavorite Garnet, Baguette, VS

3.8 x 1.8 mm

$ 119.31

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2.39ct Orange Moonstone, Cushion, Translucent

2.39ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 4.76

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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

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
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

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

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

Posted By Love It! in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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