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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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3.88ct Yellow Citrine, Briolette, VVS-VS

3.88ct Yellow Citrine, Briolette, VVS-VS

13.7 x 7.1 mm

$ 21.72

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22.85ct Multicolor Obsidian, Oval, Opaque

22.85ct Multicolor Obsidian, Oval, Opaque

27 x 20 mm (calibrated)

$ 19.27

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0.80ct Green Chrome Diopside, Marquise, VS

0.80ct Green Chrome Diopside, Marquise, VS

9.8 x 4.6 mm

$ 19.92

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26.24ct White Scolecite, Pear Shape, Opaque

26.24ct White Scolecite, Pear Shape, Opaque

30.9 x 25.9 mm

$ 31.33

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1.44ct Pink Tourmaline, Cushion, VS-SI

1.44ct Pink Tourmaline, Cushion, VS-SI

7.4 x 6.8 mm

$ 215.14

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0.79ct Yellow Citrine, Marquise, Transparent

0.79ct Yellow Citrine, Marquise, Transparent

9.4 x 4.9 mm

$ 5.51

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27.39ct Blue Turquoise, Oval, Opaque

27.39ct Blue Turquoise, Oval, Opaque

24.8 x 17 mm

$ 81.84

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2.53ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.53ctw White Sillimanite Cat'S Eye, Oval, Translucent

7 x 5 mm (calibrated)

$ 10.04

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0.61ct Green Tourmaline, Baguette, VS

0.61ct Green Tourmaline, Baguette, VS

7.8 x 3.1 mm

$ 21.26

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0.94ct Yellow Citrine, Square, VVS-VS

0.94ct Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 6.56

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3.12ctw Purple Rhodolite Garnet, Oval, VS
Rhodolite Garnet Product Video (438761)

3.12ctw Purple Rhodolite Garnet, Oval, VS

5 x 3 mm (calibrated)

$ 50.75

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0.54ct Yellow Grossularite Garnet, Round, VS-SI

0.54ct Yellow Grossularite Garnet, Round, VS-SI

4.5 mm (calibrated)

$ 13.60

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4.39ctw Red Pyrope Garnet, Square, VS

4.39ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 33.66

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20.46ct White Howlite, Oval, Opaque

20.46ct White Howlite, Oval, Opaque

25 x 18 mm (calibrated)

$ 9.78

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13.08ct Yellow Rutile Quartz, Round, Transparent

13.08ct Yellow Rutile Quartz, Round, Transparent

16 mm (calibrated)

$ 35.54

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1.21ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

1.21ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

11.4 x 4.4 mm

$ 42.42

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0.79ct Green Peridot, Emerald Cut, VVS-VS

0.79ct Green Peridot, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 11.80

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4.94ct Pink Strawberry Quartz, Oval, Translucent

4.94ct Pink Strawberry Quartz, Oval, Translucent

14 x 10 mm (calibrated)

$ 29.77

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11.45ct Brown Tiger'S Eye, Fancy, Opaque

11.45ct Brown Tiger'S Eye, Fancy, Opaque

16 x 16 mm (calibrated)

$ 15.05

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0.90ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

0.90ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

6.3 x 4.9 mm

$ 13.39

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5.18ct Yellow Citrine, Oval, VVS-VS

5.18ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 31.11

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22.90ctw Multicolor Fossil Coral, Pear Shape, Opaque

22.90ctw Multicolor Fossil Coral, Pear Shape, Opaque

21.9 x 15.4 mm

$ 50.18

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2.13ctw Orange Sunstone, Round, Translucent

2.13ctw Orange Sunstone, Round, Translucent

7 mm (calibrated)

$ 12.05

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5.18ct Yellow Rutile Quartz, Round, Transparent

5.18ct Yellow Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 14.13

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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 -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate
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