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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
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Untreated Gemstones Treatment

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17.19ctw Green Seraphinite, Baguette, Opaque

17.19ctw Green Seraphinite, Baguette, Opaque

14 x 10 mm (calibrated)

$ 27.87

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1.56ct Red Pyrope Garnet, Fancy, VS

1.56ct Red Pyrope Garnet, Fancy, VS

9.1 x 3.5 mm

$ 18.68

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2.38ct Green Fluorite, Pear Shape, Transparent

2.38ct Green Fluorite, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 9.48

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0.94ct Orange Hessonite Garnet, Round, VS

0.94ct Orange Hessonite Garnet, Round, VS

6 mm (calibrated)

$ 16.40

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0.51ct Green Peridot, Emerald Cut, VVS-VS

0.51ct Green Peridot, Emerald Cut, VVS-VS

6 x 4 mm (calibrated)

$ 7.62

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5.33ct Multicolor Ruby In Fuchsite, Marquise, Translucent

5.33ct Multicolor Ruby In Fuchsite, Marquise, Translucent

21 x 10.1 mm

$ 36.25

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3.93ctw White Sillimanite Cat'S Eye, Oval, Translucent

3.93ctw White Sillimanite Cat'S Eye, Oval, Translucent

7.1 x 4.7 mm

$ 15.59

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9.01ct Multicolor Cinnabar, Oval, Opaque

9.01ct Multicolor Cinnabar, Oval, Opaque

20.2 x 14 mm

$ 10.54

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7.17ctw Pink Strawberry Quartz, Oval, Translucent

7.17ctw Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 54.99

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0.71ct Yellow Citrine, Heart, VS

0.71ct Yellow Citrine, Heart, VS

6 x 6 mm (calibrated)

$ 5.66

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0.97ct Orange Moonstone, Pear Shape, Transparent

0.97ct Orange Moonstone, Pear Shape, Transparent

9 x 6 mm (calibrated)

$ 1.93

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15.73ct Blue Larimar, Oval, Opaque

15.73ct Blue Larimar, Oval, Opaque

20 x 15 mm (calibrated)

$ 187.81

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2.45ct Red Almandine Garnet, Oval, VS

2.45ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 91.51

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2.95ct Green Prehnite, Oval, Transparent/Translucent

2.95ct Green Prehnite, Oval, Transparent/Translucent

9.7 x 8.3 mm

$ 18.86

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4.51ct Yellow Citrine, Oval, VVS

4.51ct Yellow Citrine, Oval, VVS

12 x 9.5 mm

$ 35.94

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2.84ct Pink Strawberry Quartz, Round, Transparent

2.84ct Pink Strawberry Quartz, Round, Transparent

9 mm (calibrated)

$ 21.07

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0.84ct Green Peridot, Oval, VVS-VS

0.84ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 5.86

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26.03ctw Multicolor Fossil Coral, Cushion, Opaque

26.03ctw Multicolor Fossil Coral, Cushion, Opaque

14 x 14 mm (calibrated)

$ 57.04

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29.25ct Green Amazonite, Cushion, Opaque

29.25ct Green Amazonite, Cushion, Opaque

24.4 x 16.2 mm

$ 29.72

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21.90ct Gray Hematite, Emerald Cut, Opaque

21.90ct Gray Hematite, Emerald Cut, Opaque

19.9 x 13.9 mm

$ 24.00

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10.82ct Black Nuummite, Oval, Opaque

10.82ct Black Nuummite, Oval, Opaque

16.8 x 12.9 mm

$ 47.74

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1.62ctw Red Pyrope Garnet, Square, VS

1.62ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.42

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7.41ct Multicolor Labradorite, Baguette, Translucent

7.41ct Multicolor Labradorite, Baguette, Translucent

12 x 10 mm (calibrated)

$ 11.15

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5.18ctw Multicolor Labradorite, Round, Translucent

5.18ctw Multicolor Labradorite, Round, Translucent

8 mm (calibrated)

$ 12.59

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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!

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
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

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 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

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate
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