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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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1.35ct Green Tourmaline, Emerald Cut, VS-SI

14 x 3.4 mm

$ 32.27

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3.23ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 24.77

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0.80ct Yellow Beryl, Oval, VVS

7.8 x 5.7 mm

$ 15.94

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2.88ctw Orange Spessartite Garnet, Round, VS

4.8 mm

$ 94.66

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1.29ct Multicolor Opal, Oval, Translucent

10.1 x 7.3 mm

$ 32.12

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3.10ct Brown Cat'S Eye Apatite, Oval, Translucent

9.4 x 6.9 mm

$ 23.77

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1.27ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 8.35

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36.96ct Multicolor Feather Pyrite, Cushion, Opaque

30.9 x 18.4 mm

$ 28.83

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3.03ct Multicolor Pietersite, Marquise, Opaque

20.6 x 6.9 mm

$ 7.42

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36.45ct Yellow Calcite, Oval, Translucent

39.5 x 22.4 mm

$ 25.05

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1.25ct Yellow Citrine, Emerald Cut, VVS-VS

7.5 x 6 mm

$ 7.26

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16.82ct Multicolor Agate, Oval, Opaque

16 x 16 mm (calibrated)

$ 16.75

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2.06ct Red Pyrope Garnet, Square, VVS-VS

7 x 7 mm (calibrated)

$ 15.79

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2.27ct Green Tourmaline, Emerald Cut, VVS

26.3 x 3.3 mm

$ 56.52

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22.84ct Multicolor Jasper, Baguette, Opaque

24.7 x 19.7 mm

$ 50.05

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1.70ct Yellow Color-Change Diaspore, Cushion, VS

9.5 x 4.8 mm

$ 69.36

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2.13ctw Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 14.85

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1.14ct Yellow Citrine, Trillion, VS

7 x 7 mm (calibrated)

$ 7.12

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12.66ct Pink Rose Quartz, Emerald Cut, Transparent

15 x 15 mm (calibrated)

$ 69.35

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14.46ct Yellow Rutile Quartz, Pear Shape, Transparent

19.4 x 14.3 mm

$ 39.29

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6.24ctw Multicolor Labradorite, Square, Transparent

5 x 5 mm (calibrated)

$ 6.58

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8.00ct White Rainbow Moonstone, Fancy, Transparent

21.2 x 8.7 mm

$ 143.42

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0.85ctw White Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 211.65

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1.92ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 3.84

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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

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 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

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate

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

Very good

Posted By Niska in August, 2025
Source: Bizrate
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