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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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1.26ct Multicolor Chocolate Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 41.42

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6.78ct Black Star Diopside, Oval, Opaque

12 x 10 mm (calibrated)

$ 33.76

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46.96ct Multicolor Ruby-Zoisite, Oval, Opaque

28.9 x 20.4 mm

$ 70.16

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6.82ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 52.30

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37.05ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

34 x 20 mm

$ 16.97

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1.24ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 8.65

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17.43ct Multicolor Coral, Oval, Opaque

29.7 x 19.8 mm

$ 57.29

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55.11ctw Gray Hematite, Round, Opaque

20 mm (calibrated)

$ 53.74

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0.96ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 7.65

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4.90ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 26.84

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0.91ct Yellow Color-Change Diaspore, Pear Shape, VVS

10.5 x 4.7 mm

$ 48.04

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1.12ct Green Tourmaline, Round, Transparent

6 mm (calibrated)

$ 22.31

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1.47ct Green Tourmaline, Emerald Cut, VVS

15.4 x 3.6 mm

$ 36.60

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2.70ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 5.38

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2.36ctw Pink Strawberry Quartz, Oval, Translucent

8.2 x 6.3 mm

$ 14.60

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0.86ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 6.59

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3.00ct Green Fluorite, Pear Shape, Transparent

10 x 8 mm (calibrated)

$ 12.34

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0.08ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 63.74

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4.18ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 22.90

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11.85ct Multicolor Agate, Round, Opaque

13 mm (calibrated)

$ 11.80

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7.15ct Yellow Citrine, Cushion, VVS

16.6 x 9.6 mm

$ 39.18

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6.13ct Multicolor Fire Agate, Oval, Opaque

16.7 x 9 mm

$ 48.09

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5.42ct Yellow Citrine, Briolette, VVS-VS

15.4 x 7.8 mm

$ 30.34

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0.88ct Yellow Color-Change Diaspore, Oval, VS

7 x 5 mm (calibrated)

$ 32.58

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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

The website was very easy to use.

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

love the site, the experience and the products.

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

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
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Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
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Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
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Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate
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