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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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6.79ct Violet Amethyst, Marquise, Transparent

6.79ct Violet Amethyst, Marquise, Transparent

18.5 x 9.5 mm

$ 47.34

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18.88ct Violet Amethyst, Emerald Cut, VVS-VS

18.88ct Violet Amethyst, Emerald Cut, VVS-VS

18 x 14.1 mm

$ 131.63

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6.60ct Multicolor Pietersite, Trillion, Opaque

6.60ct Multicolor Pietersite, Trillion, Opaque

15.4 x 14 mm

$ 15.58

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7.80ct Pink Morganite, Oval, Transparent

7.80ct Pink Morganite, Oval, Transparent

14.8 x 10.9 mm

$ 85.46

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1.38ct Pink Morganite, Oval, VS

1.38ct Pink Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 105.83

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0.48ctw Blue Kyanite, Round, VS-SI

0.48ctw Blue Kyanite, Round, VS-SI

3.7 mm

$ 8.61

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1.55ct Yellow Citrine, Emerald Cut, VVS

1.55ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 12.35

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1.11ct Orange Sunstone, Oval, Translucent

1.11ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 7.74

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2.57ctw Green Tsavorite Garnet, Square, VVS-VS
Tsavorite Garnet Product Video (346279)

2.57ctw Green Tsavorite Garnet, Square, VVS-VS

2.3 x 2.2 mm

$ 239.34

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6.07ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

6.07ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

14.2 x 10.4 mm

$ 3.50

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25.87ct White Rainbow Moonstone, Fancy, Transparent
Rainbow Moonstone Product Video (683078)

25.87ct White Rainbow Moonstone, Fancy, Transparent

33.3 x 12.8 mm

$ 206.13

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2.03ct Red Almandine Garnet, Oval, VS

2.03ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 75.82

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0.78ct White Sillimanite Cat'S Eye, Oval, Transparent

0.78ct White Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 2.99

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1.40ct Turquoise Grandidierite, Oval, Translucent

1.40ct Turquoise Grandidierite, Oval, Translucent

7.5 x 6.3 mm

$ 69.72

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3.93ctw Violet Amethyst, Oval, VVS-VS

3.93ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 21.53

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4.72ctw Purple Rhodolite Garnet, Oval, VVS-VS
Rhodolite Garnet Product Video (365318)

4.72ctw Purple Rhodolite Garnet, Oval, VVS-VS

6.5 x 5.5 mm

$ 143.61

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7.35ct Multicolor Ruby In Fuchsite, Marquise, Translucent

7.35ct Multicolor Ruby In Fuchsite, Marquise, Translucent

25.2 x 12.6 mm

$ 55.00

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0.47ct Yellow Citrine, Marquise, VVS

0.47ct Yellow Citrine, Marquise, VVS

8.1 x 4.1 mm

$ 3.28

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0.58ct Orange Citrine, Marquise, VS

0.58ct Orange Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 4.04

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10.77ct Green Moldavite, Fancy, Translucent

10.77ct Green Moldavite, Fancy, Translucent

22.3 x 19.8 mm

$ 184.05

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4.77ct Violet Amethyst, Fancy, VVS-VS

4.77ct Violet Amethyst, Fancy, VVS-VS

11.5 x 10.9 mm

$ 27.37

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29.66ct Multicolor Rainbow Pyrite, Heart, Opaque

29.66ct Multicolor Rainbow Pyrite, Heart, Opaque

25.3 x 23.8 mm

$ 76.81

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36.65ct Multicolor Jasper, Pear Shape, Opaque

36.65ct Multicolor Jasper, Pear Shape, Opaque

30.5 x 18.4 mm

$ 20.81

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3.35ct Pink Strawberry Quartz, Oval, Transparent

3.35ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 25.13

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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 -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate
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