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Home › Gemstones › Untreated Gemstones

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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Untreated Gemstones Treatment

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1.33ct Purple Spinel, Cushion, VVS-VS

1.33ct Purple Spinel, Cushion, VVS-VS

7.6 x 4.9 mm

$ 111.54

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24.13ctw Multicolor Fossil Coral, Cushion, Opaque

24.13ctw Multicolor Fossil Coral, Cushion, Opaque

18.2 x 11.4 mm

$ 47.58

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1.14ct Green Tourmaline, Emerald Cut, VVS

1.14ct Green Tourmaline, Emerald Cut, VVS

15.5 x 3.3 mm

$ 20.28

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1.84ct White Rainbow Moonstone, Oval, Transparent

1.84ct White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 31.32

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95.86ct Multicolor Moss Agate, Pear Shape, Opaque

95.86ct Multicolor Moss Agate, Pear Shape, Opaque

69.4 x 40.2 mm

$ 76.38

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2.66ct Violet Amethyst, Trillion, VS

2.66ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 19.93

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2.48ctw Green Tsavorite Garnet, Pear Shape, VS

2.48ctw Green Tsavorite Garnet, Pear Shape, VS

3.9 x 2.9 mm

$ 135.85

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9.01ct Brown Tiger'S Eye, Cushion, Opaque

9.01ct Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 8.97

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0.70ct Yellow Beryl, Oval, VVS-VS

0.70ct Yellow Beryl, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 13.94

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1.84ct Violet Amethyst, Square, VS

1.84ct Violet Amethyst, Square, VS

8 x 8 mm (calibrated)

$ 14.66

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1.44ct Yellow Citrine, Square, VS

1.44ct Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 9.46

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2.24ct White Moonstone, Oval, Transparent

2.24ct White Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 17.85

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11.50ct Violet Amethyst, Cushion, VVS

11.50ct Violet Amethyst, Cushion, VVS

15 x 15 mm (calibrated)

$ 80.18

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1.52ct Red Strawberry Quartz, Oval, Transparent

1.52ct Red Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 11.74

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0.67ct Orange Spessartite Garnet, Baguette, VS

0.67ct Orange Spessartite Garnet, Baguette, VS

5.1 x 4.3 mm

$ 22.69

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3.07ct Violet Amethyst, Trillion, VS

3.07ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 16.82

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10.59ct Multicolor Pietersite, Trillion, Opaque

10.59ct Multicolor Pietersite, Trillion, Opaque

18 x 18 mm (calibrated)

$ 35.16

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0.13ctw Black Diamond, Square, Opaque

0.13ctw Black Diamond, Square, Opaque

1.9 x 1.9 mm

$ 64.74

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1.43ct Pink Tourmaline, Emerald Cut, VVS-VS
Tourmaline Product Video (529531)

1.43ct Pink Tourmaline, Emerald Cut, VVS-VS

6 x 6 mm (calibrated)

$ 94.01

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0.93ct Yellow Color-Change Diaspore, Cushion, VVS-VS

0.93ct Yellow Color-Change Diaspore, Cushion, VVS-VS

7 x 4.6 mm

$ 49.39

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23.32ct Gray Jadeite, Oval, Translucent

23.32ct Gray Jadeite, Oval, Translucent

19.2 x 17.5 mm

$ 25.32

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0.68ct Pink Tourmaline, Oval, Transparent

0.68ct Pink Tourmaline, Oval, Transparent

6.4 x 4.8 mm

$ 27.09

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0.58ct Red Pyrope Garnet, Heart, VVS-VS

0.58ct Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 4.62

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11.91ctw Green Prehnite, Fancy, Translucent

11.91ctw Green Prehnite, Fancy, Translucent

15.8 x 10.3 mm

$ 19.58

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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 could see the actual gem I was buying

Posted By Bugs in December, 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

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate
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