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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
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Yellow Untreated Gemstones
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33.43ct Multicolor Opal, Pear Shape, Opaque

32.8 x 25.6 mm

$ 99.89

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1.07ct Pink Tourmaline, Emerald Cut, VS

7.3 x 4.6 mm

$ 80.88

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1.14ct Purple Spinel, Cushion, VS

7 x 6 mm

$ 170.32

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0.65ct Multicolor Opal, Pear Shape, Transparent

8 x 5 mm (calibrated)

$ 16.19

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0.15ct Yellow Diamond, Round, VS-SI

3.3 mm

$ 270.60

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0.88ct Yellow Tourmaline, Briolette, VS

6.9 x 4.4 mm

$ 13.30

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1.00ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 7.67

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0.91ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.34

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23.71ctw Multicolor Fossil Coral, Oval, Opaque

19.5 x 13.4 mm

$ 30.66

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0.08ct Black Diamond, Round, Opaque

2.6 mm (calibrated)

$ 27.38

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0.84ct Red Rhodolite Garnet, Fancy, VVS-VS

7.5 x 4.7 mm

$ 31.37

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2.97ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.52

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0.22ctw Black Diamond, Square, Opaque

2.3 x 2.2 mm

$ 109.56

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1.14ct Orange Zircon, Round, VS

6 mm (calibrated)

$ 27.20

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4.98ct Multicolor Labradorite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 11.01

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1.27ct Green Tourmaline, Emerald Cut, VS

20 x 2.8 mm

$ 33.40

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3.76ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 23.36

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2.24ct Green Peridot, Cushion, VS

8.3 x 7.2 mm

$ 88.20

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0.50ct Yellow Color-Change Diaspore, Marquise, VVS-VS

8.6 x 3.4 mm

$ 17.55

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25.02ctw Multicolor Jasper, Oval, Opaque

18 x 13 mm (calibrated)

$ 27.41

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1.95ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 72.83

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29.17ct Green Jadeite, Fancy, Translucent

38.8 x 16 mm

$ 23.96

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1.83ct Brown Rutile Topaz, Oval, Transparent

9.9 x 6 mm

$ 37.97

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88.08ct White Dendritic Agate, Oval, Opaque

51 x 33.8 mm

$ 43.87

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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

love the site, the experience and the products.

Posted By Ckingpots in July, 2025
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Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
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Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

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

It was easy to navigate

Posted By GemGod in July, 2025
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Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate
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