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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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1.08ct Purple Spinel, Cushion, VS

1.08ct Purple Spinel, Cushion, VS

6.3 x 5.8 mm

$ 65.13

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0.81ct Yellow Beryl, Trillion, VVS

0.81ct Yellow Beryl, Trillion, VVS

7 x 7 mm (calibrated)

$ 16.14

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2.76ct Pink Strawberry Quartz, Round, Translucent

2.76ct Pink Strawberry Quartz, Round, Translucent

9 mm (calibrated)

$ 16.87

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104.33ct Pink Rose Quartz, Trillion, Transparent
Rose Quartz Product Video (522437)

104.33ct Pink Rose Quartz, Trillion, Transparent

33.9 x 32.2 mm

$ 207.82

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0.60ct Yellow Citrine, Trillion, VS

0.60ct Yellow Citrine, Trillion, VS

6 x 6 mm (calibrated)

$ 4.98

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1.37ct Pink Tourmaline, Round, Transparent

1.37ct Pink Tourmaline, Round, Transparent

7 mm (calibrated)

$ 23.49

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7.83ct Green Malachite, Oval, Opaque

7.83ct Green Malachite, Oval, Opaque

14 x 10 mm (calibrated)

$ 6.50

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2.05ct Violet Amethyst, Marquise, VVS-VS

2.05ct Violet Amethyst, Marquise, VVS-VS

20.2 x 5.1 mm

$ 14.29

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1.45ct Yellow Beryl, Oval, VVS

1.45ct Yellow Beryl, Oval, VVS

9 x 7 mm (calibrated)

$ 28.88

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7.50ct Green Prehnite, Fancy, Translucent

7.50ct Green Prehnite, Fancy, Translucent

15.8 x 11.2 mm

$ 12.33

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3.37ct Blue Chalcedony, Oval, Transparent

3.37ct Blue Chalcedony, Oval, Transparent

11 x 9 mm (calibrated)

$ 6.71

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2.55ctw Multicolor Andalusite, Oval, VS

2.55ctw Multicolor Andalusite, Oval, VS

5 x 3 mm (calibrated)

$ 136.22

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0.71ct Green Peridot, Oval, VVS-VS

0.71ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 4.95

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24.55ct Violet Charoite, Oval, Opaque

24.55ct Violet Charoite, Oval, Opaque

30 x 22 mm (calibrated)

$ 40.35

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2.07ct Green Sphene, Oval, Translucent

2.07ct Green Sphene, Oval, Translucent

8.4 x 6.7 mm

$ 11.35

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12.63ct Gray Jadeite, Oval, Translucent

12.63ct Gray Jadeite, Oval, Translucent

20 x 15 mm (calibrated)

$ 27.68

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1.16ct Violet Amethyst, Marquise, VS

1.16ct Violet Amethyst, Marquise, VS

10 x 5 mm (calibrated)

$ 7.70

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4.15ct Pink Morganite, Pear Shape, Transparent

4.15ct Pink Morganite, Pear Shape, Transparent

16 x 8 mm (calibrated)

$ 45.47

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2.02ct Orange Hessonite Garnet, Cushion, SI

2.02ct Orange Hessonite Garnet, Cushion, SI

7 x 7 mm (calibrated)

$ 39.84

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0.70ct Multicolor Opal, Marquise, Transparent

0.70ct Multicolor Opal, Marquise, Transparent

11.4 x 4.6 mm

$ 31.37

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5.10ct Orange Sunstone, Oval, Translucent

5.10ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 30.46

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0.65ct Green Peridot, Pear Shape, VVS

0.65ct Green Peridot, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 5.83

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0.94ct Blue Kyanite, Round, SI

0.94ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 23.41

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3.58ctw Brown Smoky Quartz, Round, VS

3.58ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.85

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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

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux 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

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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