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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
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Yellow Untreated Gemstones
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1.89ct Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 18.71

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4.54ct Pink Kunzite, Oval, VVS

11 x 7 mm

$ 113.05

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19.32ct Violet Amethyst, Cushion, VS

20 x 15 mm (calibrated)

$ 134.70

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2.46ctw Green Tsavorite Garnet, Pear Shape, VS

4 x 3 mm (calibrated)

$ 134.76

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2.61ct Black Star Diopside, Oval, Opaque

8 x 6 mm (calibrated)

$ 13.00

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17.70ct Blue Larimar, Oval, Opaque

20 x 15 mm (calibrated)

$ 228.95

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0.59ct Multicolor Opal, Pear Shape, Transparent

8 x 5 mm (calibrated)

$ 14.69

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1.90ct Orange Hessonite Garnet, Oval, VS-SI

8.2 x 6.6 mm

$ 33.81

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8.75ct Pink Rose Quartz, Emerald Cut, Transparent

13 x 13 mm (calibrated)

$ 47.94

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2.60ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.2 mm

$ 22.79

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0.75ct Yellow Morganite, Pear Shape, VS

7.8 x 5.7 mm

$ 32.87

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46.20ctw Gray Hematite, Heart, Opaque

20.4 x 19.1 mm

$ 101.24

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1.58ct Yellow Citrine, Trillion, VVS

9 x 9 mm (calibrated)

$ 10.39

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5.01ct Multicolor Tourmaline, Flower Cut, Transparent

14 x 14 mm (calibrated)

$ 97.66

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5.24ct Brown Smoky Quartz, Round, VS

12 mm (calibrated)

$ 8.62

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12.08ctw Black Pietersite, Oval, Opaque

14 x 10 mm (calibrated)

$ 56.97

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0.92ct Orange Hessonite Garnet, Cushion, SI

5 x 5 mm (calibrated)

$ 17.75

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2.46ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 18.87

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5.88ct Multicolor Labradorite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 13.00

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14.29ct Multicolor Jasper, Oval, Opaque

24.3 x 14.5 mm

$ 18.79

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1.15ct Yellow Citrine, Cushion, VS

8 x 6 mm (calibrated)

$ 8.59

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24.45ct Gray Hematite, Marquise, Opaque

27.3 x 13 mm

$ 24.64

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31.44ct Gray Hematite, Oval, Opaque

21.5 x 16.1 mm

$ 30.66

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12.27ct Blue Color-Change Fluorite, Round, VS

15 mm (calibrated)

$ 337.15

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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

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate
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