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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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11.97ct Pink Aragonite, Oval, Opaque

11.97ct Pink Aragonite, Oval, Opaque

19.4 x 13.7 mm

$ 14.01

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28.48ctw Multicolor Jasper, Cushion, Opaque

28.48ctw Multicolor Jasper, Cushion, Opaque

21.8 x 14.3 mm

$ 16.73

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5.78ct Pink Kunzite, Emerald Cut, VVS-VS

5.78ct Pink Kunzite, Emerald Cut, VVS-VS

11.7 x 8.6 mm

$ 152.55

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4.95ct Yellow Citrine, Briolette, VVS-VS

4.95ct Yellow Citrine, Briolette, VVS-VS

14 x 8.1 mm

$ 27.71

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0.37ct Orange Spessartite Garnet, Oval, VS

0.37ct Orange Spessartite Garnet, Oval, VS

4.9 x 3.3 mm

$ 11.06

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8.01ct Multicolor Boulder Opal, Cushion, Opaque

8.01ct Multicolor Boulder Opal, Cushion, Opaque

15.6 x 8.8 mm

$ 55.84

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25.10ct Blue Chalcedony, Cushion, Opaque

25.10ct Blue Chalcedony, Cushion, Opaque

24 x 20.2 mm

$ 62.50

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5.26ct Violet Amethyst, Pear Shape, VVS

5.26ct Violet Amethyst, Pear Shape, VVS

15 x 10 mm (calibrated)

$ 40.34

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1.01ct Blue Kyanite, Oval, SI

1.01ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 25.15

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23.16ct Multicolor Feather Pyrite, Oval, Opaque

23.16ct Multicolor Feather Pyrite, Oval, Opaque

25 x 18 mm (calibrated)

$ 18.07

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40.75ct Multicolor Jasper, Oval, Opaque

40.75ct Multicolor Jasper, Oval, Opaque

42.1 x 21.4 mm

$ 34.38

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3.84ctw Brown Smoky Quartz, Round, VVS-VS

3.84ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 8.42

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1.70ct Orange Moonstone, Square, Translucent

1.70ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 3.40

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20.96ct Green Aventurine, Oval, Translucent

20.96ct Green Aventurine, Oval, Translucent

26.1 x 15 mm

$ 20.87

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5.84ctw Pink Strawberry Quartz, Round, Translucent

5.84ctw Pink Strawberry Quartz, Round, Translucent

9 mm (calibrated)

$ 36.15

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3.03ctw Yellow Citrine, Emerald Cut, VVS

3.03ctw Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 24.14

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2.36ct White Moonstone, Oval, Translucent

2.36ct White Moonstone, Oval, Translucent

10 x 8 mm (calibrated)

$ 18.81

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3.02ct Pink Strawberry Quartz, Oval, Transparent

3.02ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 22.65

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10.95ct Red Star Garnet, Oval, Opaque

10.95ct Red Star Garnet, Oval, Opaque

13.8 x 11.4 mm

$ 11.35

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2.75ct Green Prehnite, Oval, Transparent

2.75ct Green Prehnite, Oval, Transparent

8.4 x 7.9 mm

$ 15.07

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0.82ct Green Tourmaline, Emerald Cut, VVS

0.82ct Green Tourmaline, Emerald Cut, VVS

10.6 x 3.3 mm

$ 20.42

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1.09ct Yellow Beryl, Round, VVS

1.09ct Yellow Beryl, Round, VVS

7.5 mm (calibrated)

$ 21.71

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0.83ct Yellow Color-Change Diaspore, Cushion, VVS

0.83ct Yellow Color-Change Diaspore, Cushion, VVS

7 x 5 mm (calibrated)

$ 34.30

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5.70ctw Violet Amethyst, Trillion, VS
Amethyst Product Video (674451)

5.70ctw Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 39.74

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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 found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
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Easy to use website

Posted By Mel in February, 2026
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Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

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I feel Gemselect is a trustworthy company to buy from

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Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
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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
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