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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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1.26ct Yellow Color-Change Diaspore, Emerald Cut, VVS

12.6 x 3.4 mm

$ 66.52

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21.45ctw Black Spinel, Fancy, Opaque

18.2 x 12 mm

$ 117.51

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14.47ct Multicolor Coral, Oval, Translucent

20 x 15 mm (calibrated)

$ 45.18

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23.61ctw Multicolor Fossil Coral, Fancy, Opaque

26.8 x 10.8 mm

$ 42.16

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7.39ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 40.49

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1.36ctw White Rainbow Moonstone, Pear Shape, Transparent

5 x 5 mm (calibrated)

$ 25.33

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1.11ct Yellow Beryl, Cushion, VS

8 x 6 mm (calibrated)

$ 26.54

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4.73ctw Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 103.64

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0.60ct Purple Spinel, Cushion, VVS-VS

4.8 x 4.3 mm

$ 41.83

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108.80ct Pink Rose Quartz, Oval, Transparent

34.2 x 24.8 mm

$ 238.40

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5.46ct Multicolor Ruby In Fuchsite, Marquise, Translucent

20.1 x 9.8 mm

$ 36.65

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2.37ct Orange Hessonite Garnet, Oval, VVS-VS

9 x 7.4 mm

$ 38.15

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8.62ct Green Actinolite Cat'S Eye, Oval, Translucent

16.8 x 11.9 mm

$ 60.10

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3.03ct Purple Cat'S Eye Tourmaline, Cushion, Translucent

10.3 x 6.6 mm

$ 452.68

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26.31ct Black Snowflake Obsidian, Oval, Opaque

30.3 x 19.9 mm

$ 15.45

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0.66ct Yellow Morganite, Pear Shape, VS

7.8 x 5.7 mm

$ 28.93

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2.37ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 20.75

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0.62ct Pink Tourmaline, Oval, Transparent

6.1 x 4.2 mm

$ 24.70

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3.00ctw Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 51.43

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20.09ct Red Ruby-Zoisite, Flower Cut, Opaque

20 x 15 mm (calibrated)

$ 24.41

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1.26ct Yellow Beryl, Round, VVS

7 mm (calibrated)

$ 25.10

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0.56ct Orange Spessartite Garnet, Oval, VS-SI

5 x 4 mm (calibrated)

$ 16.73

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4.60ct Multicolor Fire Agate, Fancy, Translucent

12.6 x 9.8 mm

$ 36.09

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0.45ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 3.59

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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!

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IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

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selection was broad and the check out was quick. Great site

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I think therea's no problem

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Filters need to be improved but rest of website is great

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good navigation and simple interface.

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It's mostly good, only some item's are easier to find through the search than the menu

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