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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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5.03ctw Multicolor Pietersite, Round, Opaque

5.03ctw Multicolor Pietersite, Round, Opaque

10 mm (calibrated)

$ 12.32

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4.37ct Yellow Citrine, Oval, VVS-VS

4.37ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 34.82

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44.10ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

44.10ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

29.3 x 21.3 mm

$ 43.92

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2.22ctw Red Pyrope Garnet, Marquise, VVS-VS

2.22ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.1 mm

$ 19.46

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1.53ct Green Tourmaline, Oval, VS

1.53ct Green Tourmaline, Oval, VS

6.7 x 6.4 mm

$ 177.79

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12.94ct Green Prehnite, Fancy, Translucent

12.94ct Green Prehnite, Fancy, Translucent

18 x 13 mm (calibrated)

$ 21.26

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5.42ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

5.42ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 14.04

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5.41ct Orange Imperial Topaz, Pear Shape, VS
Imperial Topaz Product Video (346645)

5.41ct Orange Imperial Topaz, Pear Shape, VS

18.1 x 7.5 mm

$ 3,319.23

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2.49ctw Orange Moonstone, Cushion, Translucent

2.49ctw Orange Moonstone, Cushion, Translucent

7 x 7 mm (calibrated)

$ 4.96

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3.44ct Green Tourmaline, Emerald Cut, SI
Tourmaline Product Video (347654)

3.44ct Green Tourmaline, Emerald Cut, SI

26.6 x 3.9 mm

$ 143.91

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2.50ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.50ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8 x 6 mm (calibrated)

$ 49.30

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2.20ct Purple Rhodolite Garnet, Oval, VVS-VS

2.20ct Purple Rhodolite Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 58.98

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11.59ctw Multicolor Jasper, Pear Shape, Opaque

11.59ctw Multicolor Jasper, Pear Shape, Opaque

20.4 x 13.6 mm

$ 6.81

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3.20ct Violet Amethyst, Marquise, VVS-VS

3.20ct Violet Amethyst, Marquise, VVS-VS

15 x 7 mm

$ 22.31

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5.44ctw Green Prehnite, Pear Shape, Transparent

5.44ctw Green Prehnite, Pear Shape, Transparent

11.2 x 7.3 mm

$ 29.80

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47.25ct Green Amazonite, Round, Opaque

47.25ct Green Amazonite, Round, Opaque

30.4 mm

$ 37.65

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1.18ctw Orange Zircon, Oval, VVS

1.18ctw Orange Zircon, Oval, VVS

5.2 x 4.2 mm

$ 29.38

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1.71ctw Red Pyrope Garnet, Marquise, VVS-VS

1.71ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5 mm

$ 14.99

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0.70ct Pink Spinel, Cushion, VVS-VS

0.70ct Pink Spinel, Cushion, VVS-VS

5.6 x 4.6 mm

$ 48.80

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7.16ct Multicolor Labradorite, Cushion, Translucent

7.16ct Multicolor Labradorite, Cushion, Translucent

17.9 x 8.3 mm

$ 10.77

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0.49ct Blue Kyanite, Round, SI

0.49ct Blue Kyanite, Round, SI

4 mm (calibrated)

$ 12.20

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2.17ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.17ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6.5 x 6.5 mm

$ 36.50

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0.74ct Green Peridot, Oval, VS

0.74ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.16

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13.16ct Multicolor Rainbow Pyrite, Trillion, Opaque

13.16ct Multicolor Rainbow Pyrite, Trillion, Opaque

22 x 19 mm

$ 34.08

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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

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate
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