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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
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1.33ctw Red Pyrope Garnet, Pear Shape, VVS-VS

1.33ctw Red Pyrope Garnet, Pear Shape, VVS-VS

7.1 x 4.8 mm

$ 10.60

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29.93ct Pink Kunzite, Emerald Cut, VS
Kunzite Product Video (695901)

29.93ct Pink Kunzite, Emerald Cut, VS

20 x 15 mm (calibrated)

$ 745.26

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0.76ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

0.76ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

6.3 x 3.8 mm

$ 24.19

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3.81ct Yellow Citrine, Oval, VS

3.81ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 20.87

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6.02ct Violet Amethyst, Oval, Transparent

6.02ct Violet Amethyst, Oval, Transparent

14.5 x 11.3 mm

$ 29.98

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2.42ct Orange Hessonite Garnet, Cushion, VS-SI

2.42ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 45.07

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0.36ct Red Spinel, Baguette, VVS-VS

0.36ct Red Spinel, Baguette, VVS-VS

3.7 x 3 mm

$ 29.88

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63.49ct Multicolor Jasper, Oval, Opaque

63.49ct Multicolor Jasper, Oval, Opaque

46.7 x 30.3 mm

$ 36.67

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2.94ct Yellow Golden Beryl, Oval, VVS-VS

2.94ct Yellow Golden Beryl, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 73.57

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15.85ct Purple Ruby-Zoisite, Flower Cut, Opaque

15.85ct Purple Ruby-Zoisite, Flower Cut, Opaque

15.3 x 14.1 mm

$ 18.93

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11.12ct Violet Amethyst, Flower Cut, Translucent

11.12ct Violet Amethyst, Flower Cut, Translucent

19.5 x 12.4 mm

$ 33.22

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1.00ctw Green Peridot, Marquise, VVS-VS

1.00ctw Green Peridot, Marquise, VVS-VS

7.9 x 3.9 mm

$ 8.76

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24.18ct Gray Jadeite, Oval, Translucent

24.18ct Gray Jadeite, Oval, Translucent

22.6 x 18 mm

$ 39.74

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13.64ct White Rainbow Moonstone, Baguette, Transparent

13.64ct White Rainbow Moonstone, Baguette, Transparent

15 x 13.4 mm

$ 108.68

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1.07ct White Rainbow Moonstone, Oval, Transparent

1.07ct White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 34.10

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9.45ct Multicolor Boulder Opal, Fancy, Opaque

9.45ct Multicolor Boulder Opal, Fancy, Opaque

23.9 x 9.5 mm

$ 47.06

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2.37ct Red Almandine Garnet, Oval, VVS-VS

2.37ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 88.52

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5.78ctw Violet Amethyst, Trillion, VVS-VS

5.78ctw Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 40.30

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13.91ct Multicolor Coral, Oval, Translucent

13.91ct Multicolor Coral, Oval, Translucent

23.3 x 17.9 mm

$ 30.48

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1.84ct Violet Amethyst, Marquise, VS

1.84ct Violet Amethyst, Marquise, VS

12.1 x 6.1 mm

$ 14.11

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20.34ct White Dendritic Agate, Fancy, Opaque

20.34ct White Dendritic Agate, Fancy, Opaque

28.1 x 15.1 mm

$ 14.18

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7.85ctw Violet Amethyst, Oval, Transparent

7.85ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 31.04

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0.92ct Yellow Citrine, Marquise, VVS-VS

0.92ct Yellow Citrine, Marquise, VVS-VS

9 x 5.1 mm

$ 7.33

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5.56ct Yellow Apatite, Oval, VS

5.56ct Yellow Apatite, Oval, VS

14 x 10 mm (calibrated)

$ 152.05

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 -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
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

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
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

Overall Rating -> 10 star ratings

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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