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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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0.84ctw Green Peridot, Pear Shape, VVS-VS

0.84ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 6.44

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1.96ct Green Tourmaline, Emerald Cut, VS

1.96ct Green Tourmaline, Emerald Cut, VS

17.8 x 3.7 mm

$ 47.24

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0.47ctw Green Kornerupine, Oval, VS

0.47ctw Green Kornerupine, Oval, VS

4.5 x 3.2 mm

$ 25.75

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1.98ct Yellow Beryl, Round, VVS-VS

1.98ct Yellow Beryl, Round, VVS-VS

9 mm (calibrated)

$ 47.33

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0.70ct Green Peridot, Oval, VVS-VS

0.70ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 4.88

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5.32ct Purple Kunzite, Oval, VS

5.32ct Purple Kunzite, Oval, VS

11 x 9 mm (calibrated)

$ 146.40

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4.04ctw Red Pyrope Garnet, Square, VS

4.04ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 30.98

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14.29ct Multicolor Jasper, Oval, Opaque

14.29ct Multicolor Jasper, Oval, Opaque

24.3 x 14.5 mm

$ 18.79

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1.00ct Pink Morganite, Oval, VS

1.00ct Pink Morganite, Oval, VS

7.3 x 5.8 mm

$ 43.82

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3.42ct Yellow Citrine, Oval, VVS-VS

3.42ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 20.91

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5.86ct Yellow Citrine, Briolette, VVS

5.86ct Yellow Citrine, Briolette, VVS

15.5 x 8.1 mm

$ 32.80

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1.04ct Orange Spessartite Garnet, Oval, VS-SI

1.04ct Orange Spessartite Garnet, Oval, VS-SI

7.3 x 5.7 mm

$ 250.33

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1.20ct Pink Morganite, Oval, VS

1.20ct Pink Morganite, Oval, VS

8 x 6.3 mm

$ 92.03

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27.75ct Violet Charoite, Oval, Opaque

27.75ct Violet Charoite, Oval, Opaque

27.7 x 21.7 mm

$ 41.47

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23.46ct Blue Turquoise, Oval, Opaque

23.46ct Blue Turquoise, Oval, Opaque

22.4 x 20.7 mm

$ 70.10

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2.04ctw Red Pyrope Garnet, Marquise, VVS-VS

2.04ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 17.88

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0.39ct Purple Spinel, Cushion, VS

0.39ct Purple Spinel, Cushion, VS

4.7 x 3.7 mm

$ 27.19

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0.54ct Red Pyrope Garnet, Heart, VVS-VS

0.54ct Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 13.45

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3.51ct Yellow Citrine, Oval, VS

3.51ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 24.47

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0.97ct Multicolor Opal, Oval, Translucent

0.97ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 30.52

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18.51ct Pink Rose Quartz, Oval, Transparent

18.51ct Pink Rose Quartz, Oval, Transparent

19.5 x 16 mm

$ 101.40

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3.43ctw Multicolor Opal, Round, Transparent

3.43ctw Multicolor Opal, Round, Transparent

7 mm (calibrated)

$ 80.08

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0.85ct Yellow Morganite, Oval, VS

0.85ct Yellow Morganite, Oval, VS

7.8 x 5.8 mm

$ 37.25

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15.29ct Black Tourmaline, Cushion, Opaque

15.29ct Black Tourmaline, Cushion, Opaque

16 x 13.1 mm

$ 54.37

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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

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

Posted By Designer in December, 2025
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

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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