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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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11.38ct Brown Tiger'S Eye, Fancy, Opaque

11.38ct Brown Tiger'S Eye, Fancy, Opaque

15 x 15 mm (calibrated)

$ 13.35

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2.95ctw Brown Rutile Quartz, Round, Transparent

2.95ctw Brown Rutile Quartz, Round, Transparent

7 mm (calibrated)

$ 12.47

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4.35ct Green Apatite, Emerald Cut, VS
Apatite Product Video (399654)

4.35ct Green Apatite, Emerald Cut, VS

9 x 9 mm (calibrated)

$ 207.52

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0.66ct Yellow Color-Change Diaspore, Pear Shape, VS-SI

0.66ct Yellow Color-Change Diaspore, Pear Shape, VS-SI

7.7 x 5.3 mm

$ 35.17

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2.44ct Green Prehnite, Oval, Transparent

2.44ct Green Prehnite, Oval, Transparent

10 x 7 mm (calibrated)

$ 13.36

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2.16ctw White Rainbow Moonstone, Oval, Transparent

2.16ctw White Rainbow Moonstone, Oval, Transparent

7 x 6 mm

$ 71.01

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6.60ct Pink Rose Quartz, Flower Cut, Transparent

6.60ct Pink Rose Quartz, Flower Cut, Transparent

14.3 x 10 mm

$ 26.25

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1.33ct White Rainbow Moonstone, Round, Transparent

1.33ct White Rainbow Moonstone, Round, Transparent

7 mm (calibrated)

$ 22.64

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10.57ctw Green Prehnite, Fancy, Translucent

10.57ctw Green Prehnite, Fancy, Translucent

15.8 x 10.9 mm

$ 17.38

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1.65ct Brown Color-Change Garnet, Oval, VS

1.65ct Brown Color-Change Garnet, Oval, VS

7.2 x 5.6 mm

$ 131.82

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1.08ct Green Tourmaline, Emerald Cut, VVS

1.08ct Green Tourmaline, Emerald Cut, VVS

17.7 x 2.9 mm

$ 26.04

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4.91ctw Yellow Citrine, Oval, VVS-VS

4.91ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 26.90

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1.39ct White Sillimanite Cat'S Eye, Oval, Transparent

1.39ct White Sillimanite Cat'S Eye, Oval, Transparent

7.7 x 5.4 mm

$ 4.34

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4.69ct Orange Sunstone, Round, Translucent

4.69ct Orange Sunstone, Round, Translucent

11 mm (calibrated)

$ 51.39

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1.41ct Orange Sunstone, Oval, Translucent

1.41ct Orange Sunstone, Oval, Translucent

8.2 x 6.3 mm

$ 23.36

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9.53ct Multicolor Agate, Round, Opaque

9.53ct Multicolor Agate, Round, Opaque

12 mm (calibrated)

$ 9.50

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0.92ctw Yellow Citrine, Heart, VVS

0.92ctw Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 6.42

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0.56ct Yellow Citrine, Cushion, Transparent

0.56ct Yellow Citrine, Cushion, Transparent

5.2 x 5.2 mm

$ 4.18

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5.36ct Brown Smoky Quartz, Pear Shape, VVS

5.36ct Brown Smoky Quartz, Pear Shape, VVS

14.9 x 0.9 mm

$ 10.67

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0.64ct Pink Tourmaline, Round, Transparent

0.64ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 25.50

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6.02ct Turquoise Grandidierite, Oval, Translucent
Grandidierite Product Video (471872)

6.02ct Turquoise Grandidierite, Oval, Translucent

13 x 9 mm (calibrated)

$ 986.04

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2.12ct Orange Moonstone, Square, Transparent

2.12ct Orange Moonstone, Square, Transparent

7 x 7 mm (calibrated)

$ 4.24

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14.63ct Violet Amethyst, Oval, IF

14.63ct Violet Amethyst, Oval, IF

20 x 15 mm (calibrated)

$ 97.14

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4.70ct Pink Strawberry Quartz, Oval, Translucent

4.70ct Pink Strawberry Quartz, Oval, Translucent

14 x 10 mm (calibrated)

$ 28.33

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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

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt 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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