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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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Yellow Untreated Gemstones
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2.87ct Violet Amethyst, Trillion, VVS-VS

2.87ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 20.01

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2.20ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458260)

2.20ctw Green Demantoid Garnet, Oval, VS

4.4 x 3.5 mm

$ 241.03

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4.09ctw Red Almandine Garnet, Oval, VS

4.09ctw Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 152.76

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0.90ctw Yellow Citrine, Heart, VVS

0.90ctw Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 7.17

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1.14ct Red Rhodolite Garnet, Emerald Cut, VS

1.14ct Red Rhodolite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 51.30

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1.74ct Orange Hessonite Garnet, Oval, VS

1.74ct Orange Hessonite Garnet, Oval, VS

8.2 x 6.4 mm

$ 30.97

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3.12ct Brown Tiger'S Eye, Oval, Opaque

3.12ct Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 3.10

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7.46ct Brown Tiger'S Eye, Baguette, Opaque

7.46ct Brown Tiger'S Eye, Baguette, Opaque

14 x 10 mm (calibrated)

$ 7.43

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5.83ct Black Cat'S Eye Scapolite, Oval, Translucent

5.83ct Black Cat'S Eye Scapolite, Oval, Translucent

10.2 x 9.3 mm

$ 31.94

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1.81ctw Green Peridot, Oval, VS

1.81ctw Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 12.62

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0.47ct Multicolor Labradorite, Pear Shape, Translucent

0.47ct Multicolor Labradorite, Pear Shape, Translucent

6 x 4 mm (calibrated)

$ 1.04

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1.42ct Multicolor Opal, Oval, Translucent

1.42ct Multicolor Opal, Oval, Translucent

10 x 8 mm (calibrated)

$ 65.34

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0.83ct Green Sphene, Oval, Transparent

0.83ct Green Sphene, Oval, Transparent

5.3 x 4.8 mm

$ 4.55

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5.69ct Green Druzy Variscite, Fancy, Opaque

5.69ct Green Druzy Variscite, Fancy, Opaque

16 x 12.5 mm

$ 5.83

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4.70ct Brown Smoky Quartz, Round, VS

4.70ct Brown Smoky Quartz, Round, VS

12 mm (calibrated)

$ 7.73

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3.51ct Green Prehnite, Pear Shape, Transparent/Translucent

3.51ct Green Prehnite, Pear Shape, Transparent/Translucent

9.7 x 8.8 mm

$ 7.69

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28.32ct Multicolor Coral, Cushion, Opaque

28.32ct Multicolor Coral, Cushion, Opaque

25.3 x 20.3 mm

$ 41.58

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6.29ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

6.29ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

17.1 x 11.7 mm

$ 16.28

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0.64ct Purple Spinel, Round, VVS-VS

0.64ct Purple Spinel, Round, VVS-VS

5 mm (calibrated)

$ 26.93

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2.67ct Violet Amethyst, Trillion, VS

2.67ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 14.63

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1.94ct Pink Kunzite, Cushion, VVS

1.94ct Pink Kunzite, Cushion, VVS

7.2 x 6 mm

$ 53.39

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1.11ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.11ct Gray Sillimanite Cat'S Eye, Oval, Transparent

6.9 x 5.3 mm

$ 3.64

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1.97ct Yellow Citrine, Trillion, VS

1.97ct Yellow Citrine, Trillion, VS

9 x 9 mm (calibrated)

$ 10.66

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0.78ct Orange Hessonite Garnet, Pear Shape, VS-SI

0.78ct Orange Hessonite Garnet, Pear Shape, VS-SI

7 x 5 mm (calibrated)

$ 17.09

View Gem
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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 -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 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
→ View All GemSelect Reviews on Bizrate
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