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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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1.51ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.51ct Yellow Color-Change Diaspore, Cushion, VVS-VS

9 x 6 mm (calibrated)

$ 79.71

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6.44ct Violet Amethyst, Marquise, VS
Amethyst Product Video (351409)

6.44ct Violet Amethyst, Marquise, VS

17.8 x 9.3 mm

$ 49.39

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7.19ct Multicolor Quartz With Marcasite, Oval, Transparent

7.19ct Multicolor Quartz With Marcasite, Oval, Transparent

13.4 x 11.4 mm

$ 47.26

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13.73ct Green Malachite, Baguette, Opaque

13.73ct Green Malachite, Baguette, Opaque

13 x 11 mm (calibrated)

$ 17.86

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1.22ct Red Pyrope Garnet, Marquise, VVS-VS

1.22ct Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5 mm

$ 10.70

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7.95ctw Violet Amethyst, Oval, Transparent

7.95ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 31.44

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46.04ct Multicolor Coral, Pear Shape, Opaque

46.04ct Multicolor Coral, Pear Shape, Opaque

33.6 x 25.7 mm

$ 67.59

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10.46ctw Multicolor Labradorite, Marquise, Translucent

10.46ctw Multicolor Labradorite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 23.12

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4.21ct Multicolor Opal, Oval, Transparent

4.21ct Multicolor Opal, Oval, Transparent

18.8 x 8.1 mm

$ 105.83

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0.08ctw Black Diamond, Round, Opaque

0.08ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 63.74

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0.43ct Blue Kyanite, Round, VS-SI

0.43ct Blue Kyanite, Round, VS-SI

4.3 mm

$ 10.71

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1.82ct Red Pyrope Garnet, Square, VVS-VS

1.82ct Red Pyrope Garnet, Square, VVS-VS

7 x 7 mm (calibrated)

$ 13.95

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7.65ct Pink Rose Quartz, Round, Transparent

7.65ct Pink Rose Quartz, Round, Transparent

12 mm (calibrated)

$ 41.92

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4.14ct Orange Sunstone, Oval, Translucent

4.14ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 24.63

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5.30ct Violet Amethyst, Pear Shape, VS

5.30ct Violet Amethyst, Pear Shape, VS

15 x 10 mm (calibrated)

$ 36.95

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1.97ctw Green Demantoid Garnet, Oval, VS

1.97ctw Green Demantoid Garnet, Oval, VS

4.4 x 3.5 mm

$ 215.83

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0.55ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.55ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6 x 4 mm (calibrated)

$ 29.03

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3.19ct Pink Strawberry Quartz, Oval, Transparent

3.19ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 23.92

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18.80ct Multicolor Jasper, Oval, Opaque

18.80ct Multicolor Jasper, Oval, Opaque

25 x 18 mm (calibrated)

$ 30.89

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56.88ct Green Bloodstone, Oval, Opaque

56.88ct Green Bloodstone, Oval, Opaque

15 x 15 mm (calibrated)

$ 24.36

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2.11ct Orange Hessonite Garnet, Cushion, VVS-VS

2.11ct Orange Hessonite Garnet, Cushion, VVS-VS

9.8 x 6.3 mm

$ 42.03

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3.74ctw Multicolor Andalusite, Round, VS

3.74ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 164.27

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4.19ct Yellow Citrine, Pear Shape, VVS-VS

4.19ct Yellow Citrine, Pear Shape, VVS-VS

12 x 12 mm (calibrated)

$ 22.96

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3.00ctw Violet Amethyst, Oval, VS

3.00ctw Violet Amethyst, Oval, VS

7 x 5 mm (calibrated)

$ 13.70

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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 website was very easy to use.

Posted By Garnet in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 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

I was able to find what I wanted very easily!

Posted By Lenny in January, 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

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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