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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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16.77ct Multicolor Rainbow Pyrite, Fancy, Opaque

16.77ct Multicolor Rainbow Pyrite, Fancy, Opaque

25.2 x 15.4 mm

$ 50.11

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39.82ct Pink Rose Quartz, Oval, Transparent

39.82ct Pink Rose Quartz, Oval, Transparent

24.8 x 22 mm

$ 52.35

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1.02ct Pink Strawberry Quartz, Oval, Transparent

1.02ct Pink Strawberry Quartz, Oval, Transparent

7.4 x 5.9 mm

$ 12.90

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3.04ct Brown Tiger'S Eye, Oval, Opaque

3.04ct Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 3.03

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2.18ctw Orange Sunstone, Oval, Translucent

2.18ctw Orange Sunstone, Oval, Translucent

8.2 x 6.3 mm

$ 15.20

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3.70ctw Multicolor Andalusite, Round, VS

3.70ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 135.42

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4.82ct Yellow Citrine, Oval, VVS-VS

4.82ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 28.93

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5.97ct Pink Strawberry Quartz, Oval, Translucent

5.97ct Pink Strawberry Quartz, Oval, Translucent

11.6 x 9.3 mm

$ 35.97

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1.39ctw Red Rhodolite Garnet, Square, VS

1.39ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.17

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5.63ct Yellow Citrine, Marquise, VVS-VS

5.63ct Yellow Citrine, Marquise, VVS-VS

20 x 10 mm (calibrated)

$ 39.25

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2.55ctw Red Rhodolite Garnet, Square, VS

2.55ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 22.32

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4.34ct Yellow Citrine, Oval, VVS-VS

4.34ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 23.77

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3.03ctw Yellow Citrine, Pear Shape, VVS

3.03ctw Yellow Citrine, Pear Shape, VVS

8 x 5 mm (calibrated)

$ 18.27

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2.48ct Orange Moonstone, Cushion, Translucent

2.48ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.94

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10.42ct Multicolor Labradorite, Pear Shape, Translucent

10.42ct Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 23.04

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7.60ct Pink Kunzite, Pear Shape, VS
Kunzite Product Video (405843)

7.60ct Pink Kunzite, Pear Shape, VS

14.2 x 10.4 mm

$ 208.16

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0.88ct Green Peridot, Oval, VVS

0.88ct Green Peridot, Oval, VVS

7 x 5 mm (calibrated)

$ 12.27

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4.67ct Pink Kunzite, Cushion, VVS

4.67ct Pink Kunzite, Cushion, VVS

9.4 x 8.2 mm

$ 128.52

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16.52ct Multicolor Agate, Oval, Opaque

16.52ct Multicolor Agate, Oval, Opaque

13.8 x 12.7 mm

$ 16.45

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1.27ctw Red Pyrope Garnet, Heart, VVS-VS

1.27ctw Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 31.62

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15.46ct Brown Smoky Quartz, Round, VVS-VS
Smoky Quartz Product Video (601427)

15.46ct Brown Smoky Quartz, Round, VVS-VS

18 mm (calibrated)

$ 62.33

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1.52ct Yellow Citrine, Emerald Cut, VVS

1.52ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 12.11

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3.10ct Red Almandine Garnet, Pear Shape, VVS-VS
Almandine Garnet Product Video (742999)

3.10ct Red Almandine Garnet, Pear Shape, VVS-VS

12 x 8 mm (calibrated)

$ 115.79

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2.09ct Yellow Sillimanite, Oval, VVS-VS

2.09ct Yellow Sillimanite, Oval, VVS-VS

8.5 x 6.7 mm

$ 51.68

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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

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
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 -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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