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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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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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10.14ct Violet Amethyst, Round, VVS

10.14ct Violet Amethyst, Round, VVS

15 mm (calibrated)

$ 80.79

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4.67ct Yellow Citrine, Oval, VVS

4.67ct Yellow Citrine, Oval, VVS

12 x 10 mm (calibrated)

$ 37.21

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53.26ct Violet Charoite, Cushion, Opaque
Charoite Product Video (567097)

53.26ct Violet Charoite, Cushion, Opaque

36 x 24.5 mm

$ 99.78

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0.50ct Orange Fire Opal, Oval, Transparent

0.50ct Orange Fire Opal, Oval, Transparent

6.9 x 5.7 mm

$ 14.43

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0.43ct Orange Citrine, Marquise, VVS-VS

0.43ct Orange Citrine, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 3.00

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1.30ct Yellow Beryl, Trillion, VVS

1.30ct Yellow Beryl, Trillion, VVS

8 x 8 mm (calibrated)

$ 25.90

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12.10ct Yellow Rutile Quartz, Fancy, Transparent

12.10ct Yellow Rutile Quartz, Fancy, Transparent

18 x 13 mm (calibrated)

$ 33.15

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0.34ct Green Kornerupine, Pear Shape, VVS

0.34ct Green Kornerupine, Pear Shape, VVS

5.6 x 4 mm

$ 18.63

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51.18ct Multicolor Rhodonite, Oval, Opaque

51.18ct Multicolor Rhodonite, Oval, Opaque

35.5 x 21.8 mm

$ 46.90

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1.49ctw Green Demantoid Garnet, Oval, VS

1.49ctw Green Demantoid Garnet, Oval, VS

4.4 x 3.5 mm

$ 163.24

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2.78ct Brown Tiger'S Eye, Oval, Opaque

2.78ct Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 2.77

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7.48ct Green Prehnite, Fancy, Translucent

7.48ct Green Prehnite, Fancy, Translucent

14.7 x 10.9 mm

$ 12.29

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17.13ct Multicolor Agate, Sphere / Ball, Opaque
Agate Product Video (701125)

17.13ct Multicolor Agate, Sphere / Ball, Opaque

13 mm (calibrated)

$ 13.65

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0.41ct Blue Kyanite, Round, VS-SI
Kyanite Product Video (577820)

0.41ct Blue Kyanite, Round, VS-SI

4.3 mm

$ 7.45

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0.65ct Pink Tourmaline, Round, Transparent

0.65ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 25.90

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0.56ct Purple Spinel, Cushion, VVS

0.56ct Purple Spinel, Cushion, VVS

4.9 x 4.7 mm

$ 39.04

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6.01ct Brown Smoky Quartz, Pear Shape, VVS

6.01ct Brown Smoky Quartz, Pear Shape, VVS

14.9 x 11.1 mm

$ 11.97

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0.42ct Pink Morganite, Pear Shape, SI

0.42ct Pink Morganite, Pear Shape, SI

6.6 x 4.7 mm

$ 18.82

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3.61ct Violet Amethyst, Round, VVS

3.61ct Violet Amethyst, Round, VVS

10 mm (calibrated)

$ 27.69

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4.71ct Multicolor Fire Agate, Fancy, Opaque

4.71ct Multicolor Fire Agate, Fancy, Opaque

10.6 x 9.7 mm

$ 27.87

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1.17ct Orange Morganite, Oval, VS

1.17ct Orange Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 52.44

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5.62ct Multicolor Pietersite, Oval, Opaque

5.62ct Multicolor Pietersite, Oval, Opaque

17.2 x 9.4 mm

$ 16.79

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14.84ctw Black Spinel, Round, Opaque

14.84ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 48.77

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28.81ctw Multicolor Fossil Coral, Cushion, Opaque

28.81ctw Multicolor Fossil Coral, Cushion, Opaque

18.8 x 11.7 mm

$ 63.13

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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 -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

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

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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