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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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1.76ct Orange Hessonite Garnet, Oval, VS-SI

8.1 x 6.7 mm

$ 26.29

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2.15ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 11.64

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1.17ct Purple Spinel, Cushion, VS

6.4 x 5.6 mm

$ 81.57

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1.28ct Green Chrome Diopside, Marquise, VS-SI

10 x 5 mm (calibrated)

$ 31.87

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3.06ct Red Almandine Garnet, Pear Shape, VS

12 x 8 mm (calibrated)

$ 25.40

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0.75ct Blue Kyanite, Oval, SI-I1

6.4 x 4.2 mm

$ 15.62

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1.17ct Orange Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 52.44

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36.57ct Multicolor Chrysocolla, Marquise, Opaque

45.5 x 19.4 mm

$ 38.25

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2.80ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.52

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3.46ctw Yellow Citrine, Pear Shape, VVS-VS

8 x 5 mm (calibrated)

$ 23.89

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14.42ct Multicolor Amethyst Geode Slice, Fancy, Transparent

20 x 15 mm (calibrated)

$ 15.37

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1.25ctw Orange Zircon, Oval, VVS

5 x 4 mm (calibrated)

$ 31.13

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19.65ct Green Serpentine, Oval, Translucent

22.2 x 15.4 mm

$ 42.08

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4.96ct Orange Spessartite Garnet, Oval, Translucent

11.3 x 8.5 mm

$ 105.58

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3.68ctw Brown Tourmaline, Oval, VVS-VS

6.8 x 5.4 mm

$ 150.79

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28.15ct Multicolor Chrysocolla, Cushion, Opaque

28.8 x 20.5 mm

$ 47.95

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45.86ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

33 x 22.4 mm

$ 20.56

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2.79ct Pink Rose Quartz, Flower Cut, Transparent

13 x 9 mm (calibrated)

$ 7.12

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1.59ct Orange Hessonite Garnet, Oval, VS-SI

7.8 x 6.4 mm

$ 31.36

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1.67ct Pink Morganite, Oval, Transparent

9 x 6 mm (calibrated)

$ 18.29

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6.94ct Pink Rose Quartz, Square, Transparent

11 x 11 mm (calibrated)

$ 38.01

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1.45ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 5 mm (calibrated)

$ 26.00

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6.38ct Multicolor Boulder Opal, Marquise, Opaque

21.1 x 9.7 mm

$ 44.48

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5.11ctw Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 10.18

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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 -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I've been looking for.

Posted By Tree Dog in April, 2026
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 -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate
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