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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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Untreated Gemstones Treatment

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1.56ctw Yellow Morganite, Pear Shape, VS

1.56ctw Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 85.46

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4.04ct Violet Amethyst, Oval, Transparent

4.04ct Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 22.13

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6.71ct Turquoise Hemimorphite Druzy, Fancy, Opaque

6.71ct Turquoise Hemimorphite Druzy, Fancy, Opaque

14.8 x 12.4 mm

$ 110.27

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5.65ct Yellow Citrine, Round, VVS

5.65ct Yellow Citrine, Round, VVS

12 mm (calibrated)

$ 43.33

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13.93ctw Black Spinel, Round, Opaque

13.93ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 45.78

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2.05ct Green Prehnite, Oval, Transparent/Translucent

2.05ct Green Prehnite, Oval, Transparent/Translucent

8 x 6.8 mm

$ 13.23

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1.79ct Orange Hessonite Garnet, Cushion, VS-SI

1.79ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 26.66

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2.84ct Yellow Citrine, Oval, Transparent

2.84ct Yellow Citrine, Oval, Transparent

10 x 8 mm (calibrated)

$ 11.16

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2.28ct Yellow Sphene, Oval, Transparent

2.28ct Yellow Sphene, Oval, Transparent

8.1 x 7.2 mm

$ 12.49

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3.45ct Brown Mother Of Pearl, Fancy, Opaque

3.45ct Brown Mother Of Pearl, Fancy, Opaque

19.6 x 13.2 mm

$ 7.95

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0.95ct Green Peridot, Oval, VS

0.95ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.62

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17.57ct Green Aventurine, Pear Shape, Translucent

17.57ct Green Aventurine, Pear Shape, Translucent

30.8 x 14.3 mm

$ 17.50

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10.02ct Green Maw-Sit-Sit, Round, Opaque

10.02ct Green Maw-Sit-Sit, Round, Opaque

12 mm (calibrated)

$ 23.37

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7.28ct Yellow Citrine, Briolette, VVS-VS

7.28ct Yellow Citrine, Briolette, VVS-VS

14.7 x 9.2 mm

$ 41.08

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1.61ct Orange Moonstone, Marquise, Translucent

1.61ct Orange Moonstone, Marquise, Translucent

9.9 x 5.7 mm

$ 3.20

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0.51ct Violet Amethyst, Emerald Cut, VS

0.51ct Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 2.96

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1.02ct Purple Spinel, Cushion, VS

1.02ct Purple Spinel, Cushion, VS

6 x 6 mm (calibrated)

$ 121.91

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2.49ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.49ctw White Sillimanite Cat'S Eye, Oval, Translucent

7 x 5 mm (calibrated)

$ 9.87

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29.23ct Green Tsavorite Garnet, Pear Shape, Opaque
Tsavorite Garnet Product Video (521026)

29.23ct Green Tsavorite Garnet, Pear Shape, Opaque

33.8 x 15 mm

$ 640.49

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11.27ct Multicolor Pietersite, Pear Shape, Opaque

11.27ct Multicolor Pietersite, Pear Shape, Opaque

25.3 x 14.3 mm

$ 33.67

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1.13ct Multicolor Opal, Oval, Translucent

1.13ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 43.78

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11.12ct Violet Amethyst, Flower Cut, Translucent

11.12ct Violet Amethyst, Flower Cut, Translucent

19.5 x 12.4 mm

$ 33.22

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1.76ct Orange Sunstone, Oval, Translucent

1.76ct Orange Sunstone, Oval, Translucent

8.9 x 7.3 mm

$ 10.52

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2.86ctw Red Pyrope Garnet, Marquise, VVS-VS

2.86ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.1 mm

$ 25.07

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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

The website was very easy to use.

Posted By Garnet in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 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

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate
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