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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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Yellow Untreated Gemstones
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1.31ct Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 13.14

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0.85ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 13.04

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1.27ct Orange Moonstone, Trillion, Translucent

8.1 x 7.7 mm

$ 2.53

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1.02ct Yellow Citrine, Square, VVS

6 x 6 mm (calibrated)

$ 7.11

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15.12ctw Green Seraphinite, Baguette, Opaque

14 x 10 mm (calibrated)

$ 24.52

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1.97ctw Orange Citrine, Heart, VVS

7 x 7 mm (calibrated)

$ 16.35

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4.77ctw Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 9.50

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12.11ctw Multicolor Pietersite, Oval, Opaque

20.3 x 13.6 mm

$ 28.34

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5.98ct Multicolor Coral, Oval, Translucent

15.2 x 11.3 mm

$ 18.67

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18.73ct Blue Chalcedony, Fancy, Opaque

25 x 18 mm (calibrated)

$ 46.65

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7.39ct Multicolor Pietersite, Trillion, Opaque

15.3 x 14.1 mm

$ 18.11

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0.70ct Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 3.49

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3.08ct Turquoise Fluorite, Oval, Transparent

10 x 8 mm (calibrated)

$ 12.67

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3.07ctw Gray Sillimanite Cat'S Eye, Oval, Translucent

6.9 x 6.7 mm

$ 9.17

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22.20ct Black Nuummite, Oval, Opaque

20.9 x 16.1 mm

$ 97.51

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36.60ct Green Amazonite, Oval, Opaque

33.9 x 23.7 mm

$ 29.17

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3.33ct Red Sunstone, Oval, Translucent

11 x 9 mm (calibrated)

$ 20.03

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5.71ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 5.69

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11.20ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 44.29

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3.52ct Multicolor Fire Agate, Fancy, Opaque

10.5 x 8.3 mm

$ 27.10

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16.26ctw Green Aventurine, Pear Shape, Translucent

20 x 13.8 mm

$ 37.59

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6.30ct Pink Rose Quartz, Emerald Cut, Transparent

11.5 x 11.4 mm

$ 28.76

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4.26ctw Brown Moonstone, Flower Cut, Translucent

10 x 10 mm (calibrated)

$ 18.67

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1.13ct Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 18.72

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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

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
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Web site is very simple to navigate Selection is terrific

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Posted By Varun in June, 2026
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Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
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Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
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Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
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