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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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12.45ct Violet Amethyst, Cushion, VVS

12.45ct Violet Amethyst, Cushion, VVS

15 x 15 mm (calibrated)

$ 86.80

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8.72ct Brown Smoky Quartz, Round, VS

8.72ct Brown Smoky Quartz, Round, VS

14 mm (calibrated)

$ 14.33

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2.10ct Yellow Citrine, Trillion, VVS-VS

2.10ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 11.36

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0.68ct Green Sphene, Oval, Transparent

0.68ct Green Sphene, Oval, Transparent

6.2 x 5.2 mm

$ 3.39

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12.00ct Multicolor Boulder Opal, Fancy, Opaque

12.00ct Multicolor Boulder Opal, Fancy, Opaque

26 x 16.3 mm

$ 59.76

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2.04ct Yellow Golden Beryl, Oval, VVS-VS

2.04ct Yellow Golden Beryl, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 50.80

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4.95ct Pink Strawberry Quartz, Oval, Translucent

4.95ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 59.16

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1.80ctw Red Pyrope Garnet, Heart, VVS-VS

1.80ctw Red Pyrope Garnet, Heart, VVS-VS

6.1 x 6.3 mm

$ 13.80

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6.87ct Pink Rose Quartz, Round, Transparent

6.87ct Pink Rose Quartz, Round, Transparent

11 mm (calibrated)

$ 37.64

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9.84ct Green Cat'S Eye Opal, Oval, Opaque

9.84ct Green Cat'S Eye Opal, Oval, Opaque

18.2 x 15.4 mm

$ 24.50

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14.96ct White Agate, Oval, Opaque

14.96ct White Agate, Oval, Opaque

20 x 15 mm (calibrated)

$ 23.70

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4.12ctw Violet Amethyst, Oval, VVS-VS

4.12ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 22.57

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0.07ctw Black Diamond, Round, Opaque

0.07ctw Black Diamond, Round, Opaque

1.9 mm (calibrated)

$ 20.34

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2.78ctw Green Peridot, Round, VVS-VS

2.78ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 45.68

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0.73ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.73ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.7 x 5.2 mm

$ 27.12

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0.45ct Green Tourmaline, Baguette, VVS-VS

0.45ct Green Tourmaline, Baguette, VVS-VS

8.3 x 2.8 mm

$ 15.69

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5.04ct Yellow Citrine, Oval, VVS-VS

5.04ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 38.65

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5.85ctw Brown Tiger'S Eye, Oval, Opaque

5.85ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 8.75

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0.90ctw Blue Kyanite, Round, VS-SI

0.90ctw Blue Kyanite, Round, VS-SI

4.3 mm

$ 22.41

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4.36ctw White Topaz, Square, VVS-VS

4.36ctw White Topaz, Square, VVS-VS

4 x 4 mm (calibrated)

$ 33.43

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5.56ctw Pink Strawberry Quartz, Oval, Transparent

5.56ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 41.70

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1.83ct Multicolor Spectrolite, Round, Opaque

1.83ct Multicolor Spectrolite, Round, Opaque

8.5 mm (calibrated)

$ 6.84

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2.35ct Pink Strawberry Quartz, Oval, Transparent

2.35ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 18.03

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11.77ct Brown Smoky Quartz, Emerald Cut, VVS-VS

11.77ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 21.92

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 -> 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

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

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 -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
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
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