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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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4.24ct Purple Rhodolite Garnet, Oval, VS

9.9 x 8.7 mm

$ 175.96

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0.91ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 6.98

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4.64ctw Violet Amethyst, Oval, VVS-VS

6.1 x 4.2 mm

$ 25.41

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1.31ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 9.13

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11.56ctw Multicolor Pietersite, Oval, Opaque

19.8 x 13 mm

$ 27.06

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1.74ct Red Almandine Garnet, Baguette, VVS

10 x 5 mm

$ 64.99

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5.88ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 32.21

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24.14ct Pink Rose Quartz, Oval, Transparent

20 x 15 mm (calibrated)

$ 31.74

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5.04ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 30.26

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0.94ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 257.47

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2.61ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 42.89

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7.19ctw Pink Moonstone, Flower Cut, Translucent

10 x 10 mm (calibrated)

$ 31.52

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4.92ct Yellow Rutile Quartz, Oval, Transparent

13 x 9 mm (calibrated)

$ 13.48

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19.50ct Violet Amethyst, Cushion, VVS-VS

20 x 15 mm (calibrated)

$ 135.95

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0.92ct Red Fire Opal, Oval, Transparent

9.4 x 7 mm

$ 32.07

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2.70ct Pink Morganite, Pear Shape, Transparent

12 x 8 mm (calibrated)

$ 29.58

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18.07ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

27.8 x 16.3 mm

$ 53.99

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32.31ct Multicolor Pietersite, Oval, Opaque

28.2 x 20.6 mm

$ 82.48

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10.01ct Yellow Jadeite, Oval, Translucent

19.4 x 13.1 mm

$ 32.90

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0.61ct Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 9.11

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4.49ct Multicolor Boulder Opal, Pear Shape, Opaque

12.3 x 9.3 mm

$ 18.63

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9.74ct Green Opal, Oval, Opaque

17.1 x 12.1 mm

$ 22.60

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42.42ct Yellow Calcite, Oval, Translucent

39.9 x 21.5 mm

$ 29.15

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4.72ct Green Jade, Oval, Opaque

12 x 10 mm (calibrated)

$ 9.40

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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

Very good and simple exchange

Posted By Waylon in March, 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

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
Source: Bizrate
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