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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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0.61ct Red Pyrope Garnet, Heart, VS

0.61ct Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 4.86

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0.59ct Yellow Citrine, Cushion, Transparent

0.59ct Yellow Citrine, Cushion, Transparent

5 x 5 mm (calibrated)

$ 4.41

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3.53ct Yellow Citrine, Cushion, VVS-VS

3.53ct Yellow Citrine, Cushion, VVS-VS

12.8 x 8 mm

$ 27.07

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2.29ctw Pink Strawberry Quartz, Round, Translucent

2.29ctw Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 13.80

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4.19ct Multicolor Opal, Oval, Transparent

4.19ct Multicolor Opal, Oval, Transparent

14 x 10 mm (calibrated)

$ 105.34

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2.67ct Blue Chalcedony, Oval, Transparent

2.67ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 5.32

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2.23ctw Pink Strawberry Quartz, Oval, Transparent

2.23ctw Pink Strawberry Quartz, Oval, Transparent

8 x 6 mm (calibrated)

$ 13.80

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1.04ct White Rainbow Moonstone, Round, Transparent

1.04ct White Rainbow Moonstone, Round, Transparent

7 mm (calibrated)

$ 33.15

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10.74ct Brown Tiger'S Eye, Baguette, Opaque

10.74ct Brown Tiger'S Eye, Baguette, Opaque

16 x 12 mm (calibrated)

$ 13.90

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11.19ct Brown Smoky Quartz, Round, VVS-VS

11.19ct Brown Smoky Quartz, Round, VVS-VS

15 mm (calibrated)

$ 13.36

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2.28ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.28ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7.8 x 7.1 mm

$ 44.96

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0.53ct Orange Spessartite Garnet, Oval, VS

0.53ct Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 15.84

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6.33ct Yellow Rutile Quartz, Round, Translucent

6.33ct Yellow Rutile Quartz, Round, Translucent

13 mm (calibrated)

$ 27.74

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1.45ctw Orange Citrine, Oval, VS

1.45ctw Orange Citrine, Oval, VS

7 x 5 mm (calibrated)

$ 14.44

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22.41ct Brown Tiger'S Eye, Fancy, Opaque

22.41ct Brown Tiger'S Eye, Fancy, Opaque

29.8 x 9.7 mm

$ 2.23

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3.08ct Purple Kunzite, Emerald Cut, VS

3.08ct Purple Kunzite, Emerald Cut, VS

8.4 x 6.8 mm

$ 84.76

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10.24ctw Multicolor Pietersite, Oval, Opaque

10.24ctw Multicolor Pietersite, Oval, Opaque

17.9 x 13.6 mm

$ 23.96

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1.57ctw Red Pyrope Garnet, Square, VS

1.57ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.04

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22.00ct Pink Rose Quartz, Oval, Transparent

22.00ct Pink Rose Quartz, Oval, Transparent

19.8 x 12.4 mm

$ 32.54

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2.54ctw Orange Spessartite Garnet, Round, VS

2.54ctw Orange Spessartite Garnet, Round, VS

4.5 mm (calibrated)

$ 86.26

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1.45ct Purple Rhodolite Garnet, Oval, VS

1.45ct Purple Rhodolite Garnet, Oval, VS

7 x 5.9 mm

$ 44.12

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33.73ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

33.73ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

31.1 x 16.1 mm

$ 33.60

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1.36ct Brown Smoky Quartz, Baguette, VVS

1.36ct Brown Smoky Quartz, Baguette, VVS

9 x 6 mm (calibrated)

$ 9.48

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1.33ctw Yellow Citrine, Marquise, VVS-VS

1.33ctw Yellow Citrine, Marquise, VVS-VS

6.2 x 3 mm

$ 7.29

View Gem
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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 am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex 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

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate
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