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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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Yellow Untreated Gemstones
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11.50ct Multicolor Jasper, Fancy, Opaque

11.50ct Multicolor Jasper, Fancy, Opaque

20.2 x 13.6 mm

$ 7.19

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7.56ct Yellow Moonstone, Oval, Translucent

7.56ct Yellow Moonstone, Oval, Translucent

14 x 10 mm (calibrated)

$ 16.65

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2.60ctw Yellow Citrine, Trillion, VVS-VS

2.60ctw Yellow Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 19.94

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2.58ct Turquoise Grandidierite, Oval, SI

2.58ct Turquoise Grandidierite, Oval, SI

10 x 8 mm (calibrated)

$ 113.06

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26.71ct Yellow Calcite, Pear Shape, Translucent

26.71ct Yellow Calcite, Pear Shape, Translucent

30.5 x 19.1 mm

$ 18.36

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21.11ct Gray Hematite, Baguette, Opaque

21.11ct Gray Hematite, Baguette, Opaque

21.3 x 11 mm

$ 21.27

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0.56ct Orange Sphalerite, Oval, SI

0.56ct Orange Sphalerite, Oval, SI

5.2 x 4.4 mm

$ 27.89

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32.34ct Brown Tiger'S Eye, Fancy, Opaque

32.34ct Brown Tiger'S Eye, Fancy, Opaque

37 x 10.5 mm

$ 3.22

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5.96ctw Green Prehnite, Oval, Transparent

5.96ctw Green Prehnite, Oval, Transparent

7.2 x 6.6 mm

$ 32.65

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0.65ct Purple Spinel, Cushion, VS

0.65ct Purple Spinel, Cushion, VS

5 x 5 mm (calibrated)

$ 32.37

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2.05ctw Red Pyrope Garnet, Marquise, VVS-VS

2.05ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5 mm

$ 17.97

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1.59ct Yellow Citrine, Oval, VS

1.59ct Yellow Citrine, Oval, VS

9.5 x 7.5 mm

$ 12.19

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4.47ctw Yellow Citrine, Oval, VVS

4.47ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 24.49

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7.02ct Bi-Color Tourmaline, Fancy, Translucent
Tourmaline Product Video (472843)

7.02ct Bi-Color Tourmaline, Fancy, Translucent

21.7 x 10.4 mm

$ 76.91

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3.53ct Multicolor Fire Agate, Fancy, Opaque

3.53ct Multicolor Fire Agate, Fancy, Opaque

11 x 9 mm (calibrated)

$ 49.74

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2.95ct Green Prehnite, Oval, Transparent

2.95ct Green Prehnite, Oval, Transparent

10.5 x 7.9 mm

$ 8.73

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6.47ct Pink Cat'S Eye Tourmaline, Oval, Translucent
Cat's Eye Tourmaline Product Video (752661)

6.47ct Pink Cat'S Eye Tourmaline, Oval, Translucent

11.5 x 9.3 mm

$ 966.62

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86.68ct Yellow Quartz, Oval, VVS

86.68ct Yellow Quartz, Oval, VVS

40.7 x 21.2 mm

$ 98.93

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0.78ct Pink Malaya Garnet, Round, VS

0.78ct Pink Malaya Garnet, Round, VS

5.3 mm

$ 34.18

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0.75ct Yellow Citrine, Heart, VVS-VS

0.75ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 5.23

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0.97ctw Red Pyrope Garnet, Square, VS

0.97ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 7.44

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0.99ctw Multicolor Opal, Oval, Transparent

0.99ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 271.16

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0.93ct Green Peridot, Emerald Cut, VS

0.93ct Green Peridot, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 13.89

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3.20ct Violet Amethyst, Trillion, VVS-VS

3.20ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 22.31

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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

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
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

love the site, the experience and the products.

Posted By Ckingpots in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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