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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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5.21ct Brown Hessonite Garnet, Oval, Translucent

13.5 x 10 mm

$ 28.54

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2.05ct Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 12.26

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0.32ct Orange Sphalerite, Round, SI-I1

4 mm (calibrated)

$ 15.94

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1.51ct Pink Tourmaline, Emerald Cut, VS

8.7 x 4.9 mm

$ 109.19

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3.48ct Violet Amethyst, Pear Shape, VVS

13 x 9 mm (calibrated)

$ 26.69

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2.05ct Orange Hessonite Garnet, Emerald Cut, SI

7 x 7 mm (calibrated)

$ 34.48

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7.74ct Green Prehnite, Fancy, Translucent

14.7 x 10.4 mm

$ 12.72

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18.63ct Green Maw-Sit-Sit, Oval, Opaque

20 x 14.4 mm

$ 61.24

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3.04ct Blue Chalcedony, Oval, Transparent

11 x 9 mm (calibrated)

$ 6.06

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1.38ct Green Tourmaline, Emerald Cut, VS-SI

13.3 x 3.7 mm

$ 30.32

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5.18ct Multicolor Labradorite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 11.45

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4.76ct Gray Quartz Cat'S Eye, Oval, Opaque

12.1 x 8.5 mm

$ 15.65

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2.51ctw Green Demantoid Garnet, Oval, VS

4.2 x 3.3 mm

$ 185.02

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0.35ct Blue Aquamarine, Round, VVS-VS

5 mm (calibrated)

$ 48.80

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3.97ctw Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 7.91

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9.78ctw Green Jadeite, Oval, Opaque

12 x 10 mm (calibrated)

$ 73.84

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0.96ctw Green Demantoid Garnet, Round, VVS-VS

3.5 mm (calibrated)

$ 142.77

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5.30ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 31.81

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2.51ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.1 mm

$ 22.00

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23.39ct White Howlite, Pear Shape, Opaque

27 x 20 mm (calibrated)

$ 11.65

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37.54ct Black Feather Pyrite, Cushion, Opaque

27 x 20 mm (calibrated)

$ 29.29

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0.51ct White Rainbow Moonstone, Baguette, Transparent

5.9 x 3.8 mm

$ 17.78

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9.19ctw Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 55.18

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3.77ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 30.03

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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

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
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Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
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Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate
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