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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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26.31ctw Multicolor Fossil Coral, Oval, Opaque

20.6 x 12 mm

$ 31.13

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0.70ct Purple Spinel, Emerald Cut, VS

6.2 x 4.5 mm

$ 25.03

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2.19ct Yellow Citrine, Flower Cut, Transparent

8.4 x 8.2 mm

$ 16.79

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1.65ct Green Tourmaline, Emerald Cut, VVS

21.5 x 3.2 mm

$ 39.77

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1.19ct Green Tourmaline, Oval, VS

6.4 x 5.8 mm

$ 45.28

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26.98ct White Rainbow Moonstone, Oval, Translucent

26.5 x 13.7 mm

$ 22.39

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2.04ct Orange Zircon, Round, VVS

7 mm (calibrated)

$ 55.88

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1.56ct Orange Hessonite Garnet, Cushion, VS-SI

6 x 6 mm (calibrated)

$ 24.41

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5.07ctw Red Pyrope Garnet, Pear Shape, VS

7 x 5 mm (calibrated)

$ 38.89

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2.05ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.1 mm

$ 17.97

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2.59ct Yellow Golden Beryl, Round, VVS

9 mm (calibrated)

$ 56.76

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1.15ct Green Sphene, Oval, Transparent

7 x 5 mm (calibrated)

$ 6.31

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50.87ct Violet Amethyst, Oval, VS

27.4 x 21.4 mm

$ 354.67

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38.66ct Black Tourmaline, Emerald Cut, Opaque

18.6 x 16.9 mm

$ 192.53

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17.54ct Multicolor Chrysocolla, Cushion, Opaque

23 x 18.1 mm

$ 24.89

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5.79ctw Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 34.26

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0.86ct Yellow Citrine, Emerald Cut, VVS

12.1 x 4.1 mm

$ 6.86

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9.95ct Gray Jadeite, Oval, Translucent

20 x 15 mm (calibrated)

$ 29.73

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0.35ct White Rainbow Moonstone, Square, Transparent

4.2 x 4.1 mm

$ 12.20

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1.19ct Yellow Sphene, Oval, Transparent

6.4 x 6.2 mm

$ 5.93

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5.41ct Yellow Citrine, Oval, VS

14.9 x 10.9 mm

$ 37.72

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10.52ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 6.18

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58.62ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

38.6 x 30.6 mm

$ 26.28

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0.69ct Green Tourmaline, Round, Transparent

5 mm (calibrated)

$ 10.50

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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

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 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

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 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
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