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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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11.53ctw Multicolor Pietersite, Round, Opaque

11.53ctw Multicolor Pietersite, Round, Opaque

14 mm (calibrated)

$ 26.99

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4.56ct Multicolor Pietersite, Oval, Opaque

4.56ct Multicolor Pietersite, Oval, Opaque

14 x 10 mm (calibrated)

$ 13.63

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2.74ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (478608)

2.74ctw Green Demantoid Garnet, Oval, VS

6.1 x 4.3 mm

$ 300.19

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8.05ct Multicolor Fire Agate, Fancy, Opaque

8.05ct Multicolor Fire Agate, Fancy, Opaque

18.2 x 10.4 mm

$ 61.90

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0.73ct Yellow Zircon, Oval, VVS

0.73ct Yellow Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 18.18

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1.05ct Orange Zircon, Oval, VVS-VS

1.05ct Orange Zircon, Oval, VVS-VS

6 x 5 mm

$ 15.69

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1.50ct Yellow Citrine, Trillion, VVS-VS
Citrine Product Video (540977)

1.50ct Yellow Citrine, Trillion, VVS-VS

8 x 8 mm (calibrated)

$ 8.20

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0.98ct Yellow Beryl, Trillion, VS

0.98ct Yellow Beryl, Trillion, VS

7 x 7 mm (calibrated)

$ 23.42

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83.43ct White Dendritic Agate, Oval, Opaque

83.43ct White Dendritic Agate, Oval, Opaque

48.4 x 34.3 mm

$ 41.55

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1.20ct Yellow Citrine, Emerald Cut, VVS-VS

1.20ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 8.37

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1.25ctw Red Pyrope Garnet, Pear Shape, VVS-VS

1.25ctw Red Pyrope Garnet, Pear Shape, VVS-VS

7 x 4.8 mm

$ 9.96

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1.97ctw Multicolor Andalusite, Oval, VS

1.97ctw Multicolor Andalusite, Oval, VS

5 x 3.2 mm

$ 105.24

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0.74ctw Yellow Citrine, Oval, VS

0.74ctw Yellow Citrine, Oval, VS

6 x 4 mm (calibrated)

$ 5.68

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0.92ct Pink Morganite, Pear Shape, VVS-VS

0.92ct Pink Morganite, Pear Shape, VVS-VS

8.6 x 5.1 mm

$ 80.63

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3.16ctw White Rainbow Moonstone, Pear Shape, Transparent

3.16ctw White Rainbow Moonstone, Pear Shape, Transparent

5 x 5 mm (calibrated)

$ 69.24

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13.86ct Bi-Color Ametrine, Pear Shape, VS

13.86ct Bi-Color Ametrine, Pear Shape, VS

17 x 17 mm (calibrated)

$ 106.29

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12.68ct Black Tourmaline, Heart, Opaque

12.68ct Black Tourmaline, Heart, Opaque

14 x 14 mm (calibrated)

$ 63.15

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1.23ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

1.23ct Yellow Color-Change Diaspore, Emerald Cut, VS-SI

8.8 x 4.8 mm

$ 64.93

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0.86ct Green Peridot, Oval, VS

0.86ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 11.99

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1.00ct Violet Spinel, Oval, VS-SI

1.00ct Violet Spinel, Oval, VS-SI

6.9 x 5.7 mm

$ 103.02

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11.11ct White Rainbow Moonstone, Baguette, Transparent

11.11ct White Rainbow Moonstone, Baguette, Transparent

19.7 x 8.6 mm

$ 165.98

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1.45ct Green Peridot, Oval, VS

1.45ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 10.59

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4.09ct Pink Strawberry Quartz, Oval, Translucent

4.09ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 28.52

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55.54ct Red Star Garnet, Round, Opaque

55.54ct Red Star Garnet, Round, Opaque

23.6 mm

$ 54.76

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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

love the site, the experience and the products.

Posted By Ckingpots in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate
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