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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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5.47ctw Multicolor Pietersite, Pear Shape, Opaque

5.47ctw Multicolor Pietersite, Pear Shape, Opaque

18.9 x 7.4 mm

$ 12.80

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4.20ctw White Topaz, Square, VS

4.20ctw White Topaz, Square, VS

4 x 4 mm (calibrated)

$ 32.21

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10.46ct Green Maw-Sit-Sit, Oval, Opaque

10.46ct Green Maw-Sit-Sit, Oval, Opaque

14.7 x 11.7 mm

$ 31.26

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3.19ctw White Topaz, Cushion, VVS-VS

3.19ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 17.48

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1.31ctw Red Rhodolite Garnet, Square, VS

1.31ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.47

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10.32ct Black Tourmaline, Oval, Opaque

10.32ct Black Tourmaline, Oval, Opaque

14.8 x 11.6 mm

$ 51.39

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2.99ctw Orange Hessonite Garnet, Emerald Cut, VS

2.99ctw Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 58.96

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3.02ctw Yellow Golden Beryl, Oval, VS

3.02ctw Yellow Golden Beryl, Oval, VS

8.9 x 6.7 mm

$ 66.18

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1.45ctw Red Pyrope Garnet, Square, VVS-VS

1.45ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 11.12

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1.18ct Yellow Color-Change Diaspore, Cushion, VVS

1.18ct Yellow Color-Change Diaspore, Cushion, VVS

10.7 x 4.4 mm

$ 41.38

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2.09ct Green Tourmaline, Emerald Cut, VS

2.09ct Green Tourmaline, Emerald Cut, VS

18.1 x 4.3 mm

$ 57.25

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4.15ctw Multicolor Pietersite, Round, Opaque

4.15ctw Multicolor Pietersite, Round, Opaque

10 mm (calibrated)

$ 9.71

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9.77ctw Green Amazonite, Round, Opaque

9.77ctw Green Amazonite, Round, Opaque

9 mm (calibrated)

$ 23.87

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0.87ct Orange Zircon, Oval, VVS-VS

0.87ct Orange Zircon, Oval, VVS-VS

5.9 x 4.8 mm

$ 21.66

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2.32ctw Yellow Citrine, Round, VVS-VS

2.32ctw Yellow Citrine, Round, VVS-VS

7 mm (calibrated)

$ 15.40

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24.08ct White Amazonite, Fancy, Translucent

24.08ct White Amazonite, Fancy, Translucent

33.5 x 8.7 mm

$ 13.19

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1.71ct Purple Rhodolite Garnet, Oval, VS

1.71ct Purple Rhodolite Garnet, Oval, VS

7.4 x 6.4 mm

$ 52.03

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1.75ctw Red Pyrope Garnet, Heart, VVS-VS

1.75ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 13.43

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4.43ctw White Topaz, Cushion, VVS-VS

4.43ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 24.27

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2.02ct Orange Hessonite Garnet, Cushion, VS

2.02ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 32.74

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3.18ctw Violet Amethyst, Marquise, VS

3.18ctw Violet Amethyst, Marquise, VS

5 x 2.6 mm

$ 17.42

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0.41ct Pink Morganite, Round, VS

0.41ct Pink Morganite, Round, VS

5.5 mm (calibrated)

$ 17.02

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1.05ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.05ct Gray Sillimanite Cat'S Eye, Oval, Transparent

6.7 x 4.7 mm

$ 3.45

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9.00ct Pink Morganite, Round, Transparent

9.00ct Pink Morganite, Round, Transparent

14 mm (calibrated)

$ 98.60

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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

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
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

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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