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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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0.96ct Yellow Color-Change Diaspore, Cushion, VVS-VS

0.96ct Yellow Color-Change Diaspore, Cushion, VVS-VS

6.6 x 4.9 mm

$ 50.68

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0.44ct Violet Amethyst, Emerald Cut, SI

0.44ct Violet Amethyst, Emerald Cut, SI

6 x 4 mm (calibrated)

$ 2.56

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4.31ct Pink Strawberry Quartz, Round, Translucent

4.31ct Pink Strawberry Quartz, Round, Translucent

11 mm (calibrated)

$ 33.06

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2.14ct Yellow Citrine, Square, VVS

2.14ct Yellow Citrine, Square, VVS

7.6 x 7.4 mm

$ 12.52

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0.07ct Black Diamond, Round, Opaque
Diamond Product Video (702343)

0.07ct Black Diamond, Round, Opaque

2.4 mm (calibrated)

$ 20.04

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4.45ct Yellow Citrine, Oval, VVS-VS

4.45ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 26.73

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4.46ct Yellow Citrine, Emerald Cut, VVS

4.46ct Yellow Citrine, Emerald Cut, VVS

11 x 9 mm (calibrated)

$ 34.20

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0.38ct Yellow Citrine, Heart, VVS

0.38ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.03

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38.37ct Gray Hematite, Oval, Opaque

38.37ct Gray Hematite, Oval, Opaque

21.8 x 17 mm

$ 37.42

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4.00ctw Brown Mali Garnet, Oval, VVS-VS
Mali Garnet Product Video (377429)

4.00ctw Brown Mali Garnet, Oval, VVS-VS

6.5 x 5.2 mm

$ 233.93

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11.47ctw Violet Amethyst, Cushion, VVS

11.47ctw Violet Amethyst, Cushion, VVS

15.1 x 9.2 mm

$ 68.54

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17.75ct Violet Amethyst, Flower Cut, Translucent

17.75ct Violet Amethyst, Flower Cut, Translucent

17.9 x 17.8 mm

$ 58.35

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15.61ct Multicolor Quartz With Marcasite, Oval, Translucent
Quartz With Marcasite Product Video (522421)

15.61ct Multicolor Quartz With Marcasite, Oval, Translucent

15.6 x 12.7 mm

$ 102.62

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0.81ct Green Peridot, Emerald Cut, VS

0.81ct Green Peridot, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 12.10

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4.91ct Yellow Citrine, Oval, VVS

4.91ct Yellow Citrine, Oval, VVS

13.3 x 9.5 mm

$ 29.75

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4.51ctw Yellow Citrine, Heart, VVS-VS
Citrine Product Video (423321)

4.51ctw Yellow Citrine, Heart, VVS-VS

6.8 x 6.6 mm

$ 29.65

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3.41ct Pink Strawberry Quartz, Oval, Transparent

3.41ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 25.58

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3.02ctw Yellow Citrine, Emerald Cut, VS

3.02ctw Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 23.16

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2.27ct Purple Kunzite, Emerald Cut, VVS-VS

2.27ct Purple Kunzite, Emerald Cut, VVS-VS

7.8 x 5.4 mm

$ 62.47

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3.77ctw Red Pyrope Garnet, Square, VS

3.77ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 28.92

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2.49ctw Green Sphene, Round, Transparent

2.49ctw Green Sphene, Round, Transparent

6 mm (calibrated)

$ 12.40

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3.85ct Yellow Apatite, Emerald Cut, VVS-VS
Apatite Product Video (439319)

3.85ct Yellow Apatite, Emerald Cut, VVS-VS

9.6 x 9.5 mm

$ 198.25

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2.50ct Yellow Citrine, Oval, VS

2.50ct Yellow Citrine, Oval, VS

10.6 x 8.3 mm

$ 13.70

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9.64ct Brown Rutile Quartz, Pear Shape, Transparent

9.64ct Brown Rutile Quartz, Pear Shape, Transparent

16 x 12 mm (calibrated)

$ 26.19

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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 love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate
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