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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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2.71ct Blue Chalcedony, Oval, Transparent

2.71ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 5.40

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26.48ct Multicolor Rhodochrosite, Fancy, Translucent

26.48ct Multicolor Rhodochrosite, Fancy, Translucent

32.4 x 13.6 mm

$ 16.92

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5.33ct Yellow Citrine, Oval, VVS-VS

5.33ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 32.00

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5.60ctw Yellow Prehnite, Round, Transparent
Prehnite Product Video (368678)

5.60ctw Yellow Prehnite, Round, Transparent

6.5 mm (calibrated)

$ 25.16

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4.62ct Multicolor Labradorite, Pear Shape, Translucent

4.62ct Multicolor Labradorite, Pear Shape, Translucent

11 x 9 mm (calibrated)

$ 10.22

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0.76ct Orange Zircon, Oval, VVS

0.76ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 11.35

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3.64ctw White Rainbow Moonstone, Square, Transparent/Translucent

3.64ctw White Rainbow Moonstone, Square, Transparent/Translucent

3 x 3 mm (calibrated)

$ 67.79

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2.43ctw Red Pyrope Garnet, Marquise, VVS-VS

2.43ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5 mm

$ 21.30

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1.53ct Green Sphene, Oval, Transparent

1.53ct Green Sphene, Oval, Transparent

6.8 x 6.2 mm

$ 8.38

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1.18ct Pink Tourmaline, Round, Transparent

1.18ct Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 19.56

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0.96ct Violet Amethyst, Marquise, VVS

0.96ct Violet Amethyst, Marquise, VVS

10 x 5 mm (calibrated)

$ 6.37

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2.34ctw Red Pyrope Garnet, Square, VS

2.34ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 17.94

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3.58ct Green Chrysoprase, Oval, Opaque

3.58ct Green Chrysoprase, Oval, Opaque

10.4 x 8.9 mm

$ 29.71

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9.98ct Multicolor Labradorite, Pear Shape, Translucent

9.98ct Multicolor Labradorite, Pear Shape, Translucent

18 x 13 mm (calibrated)

$ 22.07

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4.64ctw Red Pyrope Garnet, Marquise, VS

4.64ctw Red Pyrope Garnet, Marquise, VS

10 x 5.1 mm

$ 40.67

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15.52ct Multicolor Jasper, Oval, Opaque

15.52ct Multicolor Jasper, Oval, Opaque

24 x 14.7 mm

$ 17.00

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0.89ct Yellow Color-Change Diaspore, Cushion, VVS

0.89ct Yellow Color-Change Diaspore, Cushion, VVS

6.7 x 4.7 mm

$ 46.98

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4.80ct Orange Spessartite Garnet, Oval, Transparent

4.80ct Orange Spessartite Garnet, Oval, Transparent

10.4 x 6.9 mm

$ 119.52

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2.68ct Green Prehnite, Oval, Transparent

2.68ct Green Prehnite, Oval, Transparent

9.3 x 8 mm

$ 8.22

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0.61ct Yellow Citrine, Pear Shape, VVS

0.61ct Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 3.04

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1.06ct Purple Spinel, Pear Shape, VVS

1.06ct Purple Spinel, Pear Shape, VVS

7.1 x 5.3 mm

$ 121.94

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2.68ctw Green Peridot, Round, VVS-VS

2.68ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 44.04

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1.27ct Red Tourmaline, Oval, Transparent

1.27ct Red Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 21.77

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4.70ct Yellow Citrine, Oval, VVS

4.70ct Yellow Citrine, Oval, VVS

12 x 10 mm (calibrated)

$ 37.45

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

Posted By Love it! in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 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

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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