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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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2.92ctw Green Peridot, Round, VVS-VS

2.92ctw Green Peridot, Round, VVS-VS

5 mm (calibrated)

$ 47.99

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0.85ct Orange Morganite, Pear Shape, VS

0.85ct Orange Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 37.25

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5.95ct Yellow Citrine, Briolette, VVS

5.95ct Yellow Citrine, Briolette, VVS

14.9 x 8.4 mm

$ 32.07

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1.96ct Orange Moonstone, Cushion, Translucent

1.96ct Orange Moonstone, Cushion, Translucent

9.3 x 7.3 mm

$ 3.90

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0.90ct Pink Tourmaline, Emerald Cut, VS

0.90ct Pink Tourmaline, Emerald Cut, VS

9.8 x 3.5 mm

$ 68.04

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14.63ct Gray Jadeite, Oval, Translucent

14.63ct Gray Jadeite, Oval, Translucent

22.7 x 17.9 mm

$ 24.04

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2.59ct Orange Hessonite Garnet, Oval, VS-SI

2.59ct Orange Hessonite Garnet, Oval, VS-SI

9.1 x 7.5 mm

$ 51.08

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2.61ct Green Druzy Variscite, Trillion, Opaque

2.61ct Green Druzy Variscite, Trillion, Opaque

15.5 x 9 mm

$ 12.32

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1.22ct Yellow Citrine, Emerald Cut, VS

1.22ct Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 8.51

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2.31ct Blue Kyanite, Oval, SI

2.31ct Blue Kyanite, Oval, SI

10.7 x 7 mm

$ 50.61

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15.41ct Multicolor Boulder Opal, Oval, Opaque

15.41ct Multicolor Boulder Opal, Oval, Opaque

20 x 15 mm (calibrated)

$ 76.74

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13.71ct Multicolor Jasper, Oval, Opaque

13.71ct Multicolor Jasper, Oval, Opaque

22.1 x 16 mm

$ 30.04

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1.98ct Orange Zircon, Oval, VS
Zircon Product Video (430209)

1.98ct Orange Zircon, Oval, VS

8 x 6 mm (calibrated)

$ 54.23

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15.79ct Yellow Fire Opal, Oval, Transparent
Fire Opal Product Video (380401)

15.79ct Yellow Fire Opal, Oval, Transparent

22.3 x 14.9 mm

$ 373.84

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22.90ct Green Amazonite, Fancy, Opaque

22.90ct Green Amazonite, Fancy, Opaque

37.7 x 9.1 mm

$ 4.57

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57.88ct Violet Amethyst, Pear Shape, VVS
Amethyst Product Video (724426)

57.88ct Violet Amethyst, Pear Shape, VVS

30 x 22 mm (calibrated)

$ 433.52

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2.60ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.60ctw White Sillimanite Cat'S Eye, Oval, Translucent

7.9 x 5.3 mm

$ 10.31

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2.65ctw Red Rhodolite Garnet, Square, VS

2.65ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 23.20

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0.62ct Multicolor Opal, Pear Shape, Transparent

0.62ct Multicolor Opal, Pear Shape, Transparent

8 x 5 mm (calibrated)

$ 15.44

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4.05ct Yellow Citrine, Oval, VVS

4.05ct Yellow Citrine, Oval, VVS

12 x 10 mm (calibrated)

$ 32.27

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0.95ct Yellow Beryl, Oval, VS

0.95ct Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 18.14

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20.84ct Blue Turquoise, Oval, Opaque
Turquoise Product Video (678700)

20.84ct Blue Turquoise, Oval, Opaque

22.4 x 13.4 mm

$ 62.69

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19.00ct Brown Star Sunstone, Oval, Opaque

19.00ct Brown Star Sunstone, Oval, Opaque

15.8 x 13.6 mm

$ 157.70

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21.02ct Brown Tiger'S Eye, Oval, Opaque

21.02ct Brown Tiger'S Eye, Oval, Opaque

24.8 x 16.6 mm

$ 46.06

View Gem
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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

Very good place to buy gemstones

Posted By Elansary in March, 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

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate
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