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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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Yellow Untreated Gemstones
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2.66ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 18.54

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0.87ct Orange Fire Opal, Oval, Transparent

8.8 x 6.6 mm

$ 25.27

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1.82ct Brown Cat'S Eye Scapolite, Round, Translucent

8.5 mm (calibrated)

$ 9.97

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2.10ct Green Tourmaline, Emerald Cut, VVS-VS

15.3 x 3.9 mm

$ 57.52

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1.34ct Yellow Sphene, Oval, Transparent

7.1 x 5.6 mm

$ 6.67

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7.71ct White Quartz Cat'S Eye, Round, Transparent

12 mm (calibrated)

$ 27.46

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1.44ct Purple Sapphire, Cushion, VS

6 x 6 mm (calibrated)

$ 691.31

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1.49ct Green Tourmaline, Oval, VS

6.8 x 6.2 mm

$ 173.14

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1.50ct Orange Citrine, Round, VS

8 mm (calibrated)

$ 12.45

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9.64ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 9.60

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5.00ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 32.87

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29.17ctw Multicolor Agate Geode, Fancy, Opaque

21.2 x 16 mm

$ 29.07

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26.26ct Gray Hematite, Pear Shape, Opaque

25 x 18 mm (calibrated)

$ 26.48

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14.50ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 115.54

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0.91ct Green Tourmaline, Emerald Cut, VVS-VS

14.1 x 3.1 mm

$ 22.66

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13.48ct Green Bloodstone, Pear Shape, Opaque

17.6 x 12.4 mm

$ 29.54

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32.78ct Multicolor Jasper, Fancy, Opaque

39.4 x 10.6 mm

$ 9.79

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1.68ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 12.89

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3.84ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 21.03

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1.26ct Orange Sphalerite, Round, SI-I1

6 mm (calibrated)

$ 62.75

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2.46ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 18.87

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2.69ct Orange Hessonite Garnet, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 48.22

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6.46ct Multicolor Agate, Oval, Opaque

12.2 x 9.5 mm

$ 6.12

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1.54ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 70.87

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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 -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
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

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate
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