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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Brown Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Yellow Untreated Gemstones
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2.66ct Blue Chalcedony, Oval, Transparent

2.66ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 5.30

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13.71ctw Multicolor Labradorite, Oval, Translucent

13.71ctw Multicolor Labradorite, Oval, Translucent

18 x 13.7 mm

$ 30.04

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0.36ct Blue Kyanite, Round, VS

0.36ct Blue Kyanite, Round, VS

4 mm (calibrated)

$ 6.46

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2.31ctw Orange Spessartite Garnet, Oval, VS

2.31ctw Orange Spessartite Garnet, Oval, VS

5.3 x 3.9 mm

$ 78.45

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3.08ct Pink Rose Quartz, Emerald Cut, Transparent

3.08ct Pink Rose Quartz, Emerald Cut, Transparent

9 x 9 mm (calibrated)

$ 16.87

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1.60ctw Red Pyrope Garnet, Pear Shape, VVS-VS

1.60ctw Red Pyrope Garnet, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 12.27

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5.40ctw White Moonstone, Round, Translucent

5.40ctw White Moonstone, Round, Translucent

9 mm (calibrated)

$ 14.79

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46.19ct Multicolor Jasper, Pear Shape, Opaque

46.19ct Multicolor Jasper, Pear Shape, Opaque

37.4 x 35.5 mm

$ 27.83

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12.68ctw Violet Amethyst, Oval, Transparent

12.68ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 50.15

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2.40ct Green Peridot, Cushion, VVS-VS

2.40ct Green Peridot, Cushion, VVS-VS

8.1 x 7.7 mm

$ 76.69

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0.70ct Green Tourmaline, Emerald Cut, VVS-VS

0.70ct Green Tourmaline, Emerald Cut, VVS-VS

6 x 4 mm (calibrated)

$ 34.86

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23.51ctw Green Prehnite, Fancy, Transparent

23.51ctw Green Prehnite, Fancy, Transparent

15.8 x 10.6 mm

$ 32.72

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3.47ct Violet Amethyst, Round, VVS

3.47ct Violet Amethyst, Round, VVS

10 mm (calibrated)

$ 26.61

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3.10ctw White Rainbow Moonstone, Square, Transparent/Translucent

3.10ctw White Rainbow Moonstone, Square, Transparent/Translucent

3 x 3 mm (calibrated)

$ 49.08

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5.46ct Yellow Citrine, Oval, VVS-VS

5.46ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 32.78

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27.96ct White Scolecite, Cushion, Opaque

27.96ct White Scolecite, Cushion, Opaque

23.2 x 23 mm

$ 33.40

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28.06ctw Multicolor Moss Agate, Cushion, Translucent

28.06ctw Multicolor Moss Agate, Cushion, Translucent

22.9 x 14 mm

$ 27.95

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9.15ct Brown Tiger'S Eye, Oval, Opaque

9.15ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 9.11

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4.01ct Blue Aquamarine, Pear Shape, Translucent

4.01ct Blue Aquamarine, Pear Shape, Translucent

13 x 9 mm (calibrated)

$ 83.21

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3.23ctw Pink Strawberry Quartz, Round, Translucent
Strawberry Quartz Product Video (569760)

3.23ctw Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 19.74

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0.36ct Brown Chrysoberyl Cat'S Eye, Oval, Translucent

0.36ct Brown Chrysoberyl Cat'S Eye, Oval, Translucent

4.4 x 3.3 mm

$ 10.76

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0.66ct Orange Sphalerite, Round, SI

0.66ct Orange Sphalerite, Round, SI

5 mm (calibrated)

$ 32.87

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13.80ct Multicolor Jasper, Oval, Opaque

13.80ct Multicolor Jasper, Oval, Opaque

20 x 15 mm (calibrated)

$ 22.68

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5.34ct Yellow Moonstone, Oval, Translucent

5.34ct Yellow Moonstone, Oval, Translucent

13 x 8.6 mm

$ 11.52

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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

My whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate

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

Posted By Marti in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate
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