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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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0.80ct Pink Tourmaline, Oval, Transparent

6.4 x 4.9 mm

$ 31.87

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18.34ct Multicolor Tiger'S Eye Matrix, Fancy, Opaque

23.3 x 10.9 mm

$ 18.27

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1.71ct Red Almandine Garnet, Baguette, VVS

9.9 x 4.9 mm

$ 14.19

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17.33ct Multicolor Jasper, Oval, Opaque

36 x 14.5 mm

$ 28.48

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28.02ct White Dendritic Agate, Pear Shape, Opaque

32.9 x 17.2 mm

$ 19.53

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16.52ct Multicolor Boulder Opal, Cushion, Opaque

19 x 14.8 mm

$ 115.18

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3.74ct Turquoise Larimar, Pear Shape, Opaque

13 x 9 mm (calibrated)

$ 44.64

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4.09ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 35.85

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4.60ct Brown Smoky Quartz, Round, VVS-VS

11 mm (calibrated)

$ 7.56

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6.48ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 38.90

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2.77ctw Green Tsavorite Garnet, Square, VVS-VS

2.4 x 2.4 mm

$ 257.96

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0.55ct Orange Spessartite Garnet, Oval, VS-SI

5.1 x 4.2 mm

$ 18.26

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1.95ct Purple Tourmaline, Oval, VVS

9.5 x 8.2 mm

$ 226.59

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1.58ct Green Tourmaline, Fancy, VVS

8.8 x 8.4 mm

$ 188.84

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4.32ct Brown Smoky Quartz, Round, VVS-VS

11 mm (calibrated)

$ 7.10

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4.31ct Pink Morganite, Pear Shape, Transparent

14 x 10 mm (calibrated)

$ 47.22

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0.86ct Pink Morganite, Pear Shape, VVS

8.9 x 5.2 mm

$ 75.38

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6.17ct Multicolor Boulder Opal, Trillion, Opaque

14 x 14 mm (calibrated)

$ 30.73

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1.64ct Yellow Citrine, Trillion, Transparent

8 x 8 mm (calibrated)

$ 12.58

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15.23ct White Rainbow Moonstone, Fancy, Transparent

15 x 15 mm (calibrated)

$ 273.05

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4.94ct Green Prehnite, Fancy, Transparent

15 x 10 mm (calibrated)

$ 7.74

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2.76ctw Red Pyrope Garnet, Emerald Cut, VVS-VS

6 x 4 mm (calibrated)

$ 16.04

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1.11ct Yellow Citrine, Square, VS

6 x 6 mm (calibrated)

$ 7.74

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2.40ct Purple Rhodolite Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 95.62

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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

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The website was very easy to use.

Posted By Garnet in January, 2026
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Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

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
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
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Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate
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