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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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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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0.73ct Yellow Color-Change Garnet, Emerald Cut, VS

0.73ct Yellow Color-Change Garnet, Emerald Cut, VS

7.1 x 3.5 mm

$ 79.98

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2.37ctw Multicolor Andalusite, Round, VS-SI

2.37ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 116.85

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35.09ct Multicolor Quartz With Marcasite, Oval, Transparent
Quartz With Marcasite Product Video (521447)

35.09ct Multicolor Quartz With Marcasite, Oval, Transparent

28.7 x 21.5 mm

$ 230.67

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25.96ct Multicolor Pietersite, Oval, Opaque

25.96ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 113.76

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2.55ct Orange Hessonite Garnet, Emerald Cut, SI

2.55ct Orange Hessonite Garnet, Emerald Cut, SI

8 x 6 mm (calibrated)

$ 35.06

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21.19ct Green Druzy Variscite, Fancy, Opaque

21.19ct Green Druzy Variscite, Fancy, Opaque

33.4 x 16.6 mm

$ 89.91

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0.18ct Brown Diamond, Round, VVS-VS
Diamond Product Video (564626)

0.18ct Brown Diamond, Round, VVS-VS

3.7 mm

$ 328.60

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7.67ct Pink Strawberry Quartz, Oval, Translucent
Strawberry Quartz Product Video (555885)

7.67ct Pink Strawberry Quartz, Oval, Translucent

14.9 x 11.1 mm

$ 48.24

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12.47ct Multicolor Rainbow Pyrite, Oval, Opaque

12.47ct Multicolor Rainbow Pyrite, Oval, Opaque

22.2 x 12.4 mm

$ 32.17

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2.57ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

2.57ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

7.9 x 5.6 mm

$ 10.19

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4.37ctw Multicolor Spectrolite, Oval, Opaque

4.37ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 16.65

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1.94ct Orange Sphalerite, Round, I1

1.94ct Orange Sphalerite, Round, I1

7 mm (calibrated)

$ 96.61

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24.26ct Green Aventurine, Pear Shape, Translucent

24.26ct Green Aventurine, Pear Shape, Translucent

33.2 x 17.4 mm

$ 20.14

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0.90ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.90ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

7 x 4.4 mm

$ 27.61

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11.59ct Brown Smoky Quartz, Emerald Cut, VVS

11.59ct Brown Smoky Quartz, Emerald Cut, VVS

15 x 15 mm (calibrated)

$ 46.73

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2.65ct Yellow Sphene, Oval, VS-SI
Sphene Product Video (526855)

2.65ct Yellow Sphene, Oval, VS-SI

8.8 x 7.7 mm

$ 159.69

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7.56ct White Quartz Cat'S Eye, Round, Transparent

7.56ct White Quartz Cat'S Eye, Round, Transparent

12 mm (calibrated)

$ 33.13

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9.89ct Brown Smoky Quartz, Round, VVS

9.89ct Brown Smoky Quartz, Round, VVS

15 mm (calibrated)

$ 39.88

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23.63ct Turquoise Hiddenite, Cushion, VS-SI
Hiddenite Product Video (706348)

23.63ct Turquoise Hiddenite, Cushion, VS-SI

19.6 x 12.9 mm

$ 586.50

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0.31ct Brown Diamond, Round, VS
Diamond Product Video (564603)

0.31ct Brown Diamond, Round, VS

4.5 mm (calibrated)

$ 514.48

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2.15ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.15ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 7 mm (calibrated)

$ 42.40

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8.20ct Pink Rose Quartz, Emerald Cut, Transparent

8.20ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 44.92

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1.29ct Yellow Chrysoberyl, Pear Shape, VS
Chrysoberyl Product Video (366654)

1.29ct Yellow Chrysoberyl, Pear Shape, VS

8 x 6 mm (calibrated)

$ 150.34

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18.15ct White Rainbow Moonstone, Pear Shape, Transparent
Rainbow Moonstone Product Video (674275)

18.15ct White Rainbow Moonstone, Pear Shape, Transparent

21.9 x 16.3 mm

$ 225.97

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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

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 -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

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
→ View All GemSelect Reviews on Bizrate
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