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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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2.65ctw Multicolor Tourmaline, Flower Cut, Transparent

7.8 x 7 mm

$ 51.65

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1.34ct Green Tourmaline, Emerald Cut, VVS

11.6 x 3.7 mm

$ 36.70

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11.24ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 61.57

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1.14ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 37.47

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10.51ctw Violet Amethyst, Cushion, VVS

15.2 x 9.2 mm

$ 73.27

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2.69ct White Rainbow Moonstone, Oval, Transparent

11 x 9 mm (calibrated)

$ 85.74

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3.99ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6 mm

$ 39.47

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0.55ct Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 13.70

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2.40ct Green Peridot, Cushion, VS

9.1 x 6.5 mm

$ 92.03

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9.26ct Brown Smoky Quartz, Round, VVS-VS

15 mm (calibrated)

$ 37.34

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3.85ct Pink Morganite, Oval, Transparent

12.4 x 9.1 mm

$ 40.23

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2.56ctw Brown Kornerupine, Oval, VVS-VS

6.5 x 4.7 mm

$ 112.19

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6.62ctw Orange Carnelian, Fancy, Translucent

6 x 6 mm (calibrated)

$ 11.60

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2.69ct Yellow Citrine, Oval, VS

10 x 8 mm (calibrated)

$ 20.63

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5.67ct Green Actinolite Cat'S Eye, Oval, Translucent

13.7 x 11 mm

$ 39.53

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4.06ctw Pink Malaya Garnet, Round, VS

5.5 mm (calibrated)

$ 133.11

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19.49ct Purple Ruby-Zoisite, Flower Cut, Opaque

17.8 x 16.7 mm

$ 23.69

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0.89ct Brown Smoky Quartz, Baguette, VVS

6.5 x 5.4 mm

$ 4.43

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8.97ctw Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 53.87

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27.87ct Yellow Calcite, Pear Shape, Translucent

30 x 22 mm (calibrated)

$ 19.16

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22.67ct Brown Moonstone, Oval, Opaque

22.2 x 16 mm

$ 37.26

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5.64ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 28.09

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1.03ct Orange Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 8.55

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1.74ct Orange Hessonite Garnet, Oval, VS

7.9 x 6.6 mm

$ 34.66

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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

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
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Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
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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
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Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

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

Very good

Posted By Niska in August, 2025
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Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
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