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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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31.92ct Yellow Calcite, Pear Shape, Translucent

31.92ct Yellow Calcite, Pear Shape, Translucent

36.8 x 17.2 mm

$ 21.93

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37.83ct Black Obsidian, Pear Shape, Opaque

37.83ct Black Obsidian, Pear Shape, Opaque

33.1 x 23.5 mm

$ 41.44

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2.01ct Turquoise Fluorite, Pear Shape, Transparent

2.01ct Turquoise Fluorite, Pear Shape, Transparent

9.8 x 6.6 mm

$ 8.01

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0.23ct Yellow Sphalerite, Round, SI-I1

0.23ct Yellow Sphalerite, Round, SI-I1

3.7 mm

$ 11.45

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1.16ct Green Tourmaline, Emerald Cut, VVS

1.16ct Green Tourmaline, Emerald Cut, VVS

13.7 x 3.4 mm

$ 31.77

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45.47ct Multicolor Jasper, Pear Shape, Opaque

45.47ct Multicolor Jasper, Pear Shape, Opaque

30.9 x 24.1 mm

$ 25.81

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0.63ct Green Peridot, Oval, VVS-VS

0.63ct Green Peridot, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 11.30

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1.56ctw White Rainbow Moonstone, Oval, Transparent

1.56ctw White Rainbow Moonstone, Oval, Transparent

7 x 5 mm (calibrated)

$ 26.41

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1.30ct Purple Tourmaline, Oval, Transparent

1.30ct Purple Tourmaline, Oval, Transparent

7.8 x 5.8 mm

$ 21.55

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1.22ct Blue Kyanite, Round, VS-SI

1.22ct Blue Kyanite, Round, VS-SI

6 mm (calibrated)

$ 30.38

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19.64ct Multicolor Ruby-Zoisite, Pear Shape, Opaque

19.64ct Multicolor Ruby-Zoisite, Pear Shape, Opaque

20.2 x 14.1 mm

$ 59.17

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13.10ctw Yellow Citrine, Emerald Cut, VVS

13.10ctw Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 84.25

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1.19ct Orange Moonstone, Cushion, Translucent

1.19ct Orange Moonstone, Cushion, Translucent

6 x 6 mm (calibrated)

$ 2.37

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1.58ct Pink Tourmaline, Cushion, VS

1.58ct Pink Tourmaline, Cushion, VS

6.8 x 5.9 mm

$ 236.05

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7.83ct Pink Rose Quartz, Emerald Cut, Transparent

7.83ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 42.89

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0.86ct Yellow Morganite, Pear Shape, VS

0.86ct Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 37.69

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0.59ct Green Peridot, Emerald Cut, VVS-VS
Peridot Product Video (505201)

0.59ct Green Peridot, Emerald Cut, VVS-VS

6.1 x 4.2 mm

$ 12.30

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1.78ctw Red Pyrope Garnet, Square, VS

1.78ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.65

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7.10ct Multicolor Agate, Fancy, Opaque

7.10ct Multicolor Agate, Fancy, Opaque

9.7 x 9.5 mm

$ 5.60

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0.55ct Yellow Color-Change Diaspore, Pear Shape, VS

0.55ct Yellow Color-Change Diaspore, Pear Shape, VS

8 x 4 mm

$ 29.03

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2.07ctw Red Pyrope Garnet, Emerald Cut, VVS-VS

2.07ctw Red Pyrope Garnet, Emerald Cut, VVS-VS

5.8 x 3.9 mm

$ 15.88

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2.17ct Green Tourmaline, Emerald Cut, VVS-VS

2.17ct Green Tourmaline, Emerald Cut, VVS-VS

16.5 x 4 mm

$ 59.44

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9.84ctw Yellow Rutile Quartz, Round, Transparent

9.84ctw Yellow Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 26.84

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3.50ctw Multicolor Andalusite, Round, VS

3.50ctw Multicolor Andalusite, Round, VS

3.2 mm

$ 128.11

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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

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
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

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

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
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
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