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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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7.92ct Yellow Apatite, Cushion, VS-SI

15.2 x 11.7 mm

$ 418.23

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1.10ct Orange Hessonite Garnet, Oval, VVS-VS

7 x 5.7 mm

$ 16.80

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9.65ctw Multicolor Pietersite, Oval, Opaque

16 x 12 mm (calibrated)

$ 36.42

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0.22ct Pink Morganite, Round, VVS-VS

4.2 mm

$ 9.13

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28.11ct Multicolor Labradorite, Round, Translucent

25.3 mm

$ 62.15

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77.89ctw Multicolor Rhodochrosite, Sphere / Ball, Opaque

16.2 mm

$ 170.67

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3.26ctw Yellow Citrine, Oval, VVS

9 x 7 mm (calibrated)

$ 17.86

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1.34ctw White Rainbow Moonstone, Heart, Transparent

6 x 6 mm (calibrated)

$ 44.06

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0.03ct White Diamond, Round, VVS

2 mm (calibrated)

$ 68.48

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4.85ct Green Prehnite, Oval, Transparent

12 x 10 mm (calibrated)

$ 100.64

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0.20ctw White Diamond, Round, VVS-VS

2.9 mm (calibrated)

$ 363.37

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2.02ct Green Tourmaline, Emerald Cut, VS

15.1 x 4.4 mm

$ 100.60

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20.87ctw Multicolor Fossil Coral, Oval, Opaque

19.9 x 12.1 mm

$ 26.98

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18.92ct Violet Amethyst, Cushion, VVS

18 x 18 mm (calibrated)

$ 150.75

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52.80ct Multicolor Chrysocolla, Pear Shape, Opaque

26.8 x 25.2 mm

$ 89.93

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0.56ct Orange Citrine, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 3.90

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1.83ct Orange Hessonite Garnet, Oval, VS-SI

8.1 x 6.8 mm

$ 36.45

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1.52ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 36.25

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7.30ct Violet Amethyst, Pear Shape, VVS

16.7 x 12.2 mm

$ 50.90

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4.38ct Brown Smoky Quartz, Flower Cut, Transparent

11 x 11 mm (calibrated)

$ 18.38

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1.70ctw Yellow Citrine, Marquise, VS

9 x 5.1 mm

$ 13.55

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0.12ct Black Diamond, Round, Opaque

3 mm (calibrated)

$ 57.09

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16.78ct Multicolor Jasper, Fancy, Opaque

24.5 x 16.7 mm

$ 27.58

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52.92ct Multicolor Jasper, Oval, Opaque

36.3 x 29.5 mm

$ 43.48

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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

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate
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