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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
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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0.71ct Pink Spinel, Cushion, VS

0.71ct Pink Spinel, Cushion, VS

6 x 4 mm (calibrated)

$ 49.50

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13.90ct Multicolor Quartz With Marcasite, Oval, Transparent

13.90ct Multicolor Quartz With Marcasite, Oval, Transparent

18.9 x 12.7 mm

$ 91.37

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1.22ct White Rainbow Moonstone, Oval, Transparent

1.22ct White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 38.89

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5.18ct Yellow Citrine, Oval, VVS-VS

5.18ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 31.11

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4.21ct Multicolor Fire Agate, Fancy, Opaque

4.21ct Multicolor Fire Agate, Fancy, Opaque

13.4 x 7.6 mm

$ 35.94

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11.84ct Brown Smoky Quartz, Round, VVS-VS

11.84ct Brown Smoky Quartz, Round, VVS-VS

16 mm (calibrated)

$ 14.39

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52.18ct Multicolor Jasper, Oval, Opaque

52.18ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 29.62

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2.54ctw Green Tsavorite Garnet, Square, VVS-VS
Tsavorite Garnet Product Video (346229)

2.54ctw Green Tsavorite Garnet, Square, VVS-VS

2.4 x 2.4 mm

$ 236.54

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22.57ctw Multicolor Fossil Coral, Oval, Opaque

22.57ctw Multicolor Fossil Coral, Oval, Opaque

20.4 x 12.9 mm

$ 29.17

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3.10ct Violet Amethyst, Trillion, VS

3.10ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 23.22

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3.10ctw Yellow Citrine, Oval, VVS-VS

3.10ctw Yellow Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 21.61

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4.43ct Yellow Citrine, Cushion, VVS-VS

4.43ct Yellow Citrine, Cushion, VVS-VS

12.9 x 8.2 mm

$ 33.97

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2.80ctw Yellow Citrine, Emerald Cut, VVS-VS

2.80ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 21.47

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1.01ct Yellow Morganite, Oval, VS

1.01ct Yellow Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 60.86

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1.24ct Pink Morganite, Round, VS

1.24ct Pink Morganite, Round, VS

7.5 mm (calibrated)

$ 67.93

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0.89ct Brown Sillimanite Cat'S Eye, Oval, Translucent

0.89ct Brown Sillimanite Cat'S Eye, Oval, Translucent

5.6 x 4.7 mm

$ 2.66

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3.64ctw Brown Smoky Quartz, Round, VS

3.64ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.98

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1.03ct Blue Kyanite, Round, SI

1.03ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 25.65

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16.70ct White Rainbow Moonstone, Pear Shape, Translucent

16.70ct White Rainbow Moonstone, Pear Shape, Translucent

21.8 x 19.8 mm

$ 116.43

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2.70ctw Violet Amethyst, Heart, VVS-VS

2.70ctw Violet Amethyst, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 20.71

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26.09ct Multicolor Pietersite, Oval, Opaque

26.09ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 114.34

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3.09ctw Yellow Golden Beryl, Oval, VS

3.09ctw Yellow Golden Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 67.71

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5.86ct Green Uvarovite Garnet Drusy, Fancy, Opaque

5.86ct Green Uvarovite Garnet Drusy, Fancy, Opaque

12 x 10 mm (calibrated)

$ 19.07

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1.47ct Pink Morganite, Round, VS

1.47ct Pink Morganite, Round, VS

7.5 mm (calibrated)

$ 112.74

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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

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 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

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
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Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
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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
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Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate
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