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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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1.64ct White Cat'S Eye Moonstone, Round, Transparent

1.64ct White Cat'S Eye Moonstone, Round, Transparent

7 mm (calibrated)

$ 8.17

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17.76ct Violet Amethyst, Cushion, VVS

17.76ct Violet Amethyst, Cushion, VVS

20 x 15 mm (calibrated)

$ 123.82

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16.23ct White Dendritic Agate, Pear Shape, Translucent

16.23ct White Dendritic Agate, Pear Shape, Translucent

28.1 x 16.5 mm

$ 32.33

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3.84ctw Red Pyrope Garnet, Square, VVS-VS

3.84ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 29.45

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0.19ct Black Diamond, Square, Opaque

0.19ct Black Diamond, Square, Opaque

2.8 x 2.7 mm

$ 94.62

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0.68ct Green Tourmaline, Emerald Cut, VVS

0.68ct Green Tourmaline, Emerald Cut, VVS

4.7 x 4.6 mm

$ 33.86

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0.95ct Yellow Citrine, Marquise, VS

0.95ct Yellow Citrine, Marquise, VS

9.2 x 5.1 mm

$ 7.57

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7.63ct Brown Smoky Quartz, Emerald Cut, VVS-VS

7.63ct Brown Smoky Quartz, Emerald Cut, VVS-VS

12 x 12 mm (calibrated)

$ 14.97

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1.51ctw Green Peridot, Oval, VS

1.51ctw Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 21.06

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2.50ctw Multicolor Labradorite, Oval, Translucent

2.50ctw Multicolor Labradorite, Oval, Translucent

7.1 x 6.1 mm

$ 4.98

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4.83ct Pink Rose Quartz, Emerald Cut, Transparent

4.83ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 26.46

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36.82ct Pink Rose Quartz, Oval, Transparent

36.82ct Pink Rose Quartz, Oval, Transparent

22.1 x 18.2 mm

$ 48.41

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1.76ct Pink Strawberry Quartz, Oval, Transparent

1.76ct Pink Strawberry Quartz, Oval, Transparent

8 x 6 mm (calibrated)

$ 8.80

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56.57ct Multicolor Fossil Coral, Marquise, Opaque
Fossil Coral Product Video (447468)

56.57ct Multicolor Fossil Coral, Marquise, Opaque

66.4 x 24.2 mm

$ 90.15

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6.50ct Brown Smoky Quartz, Pear Shape, VS

6.50ct Brown Smoky Quartz, Pear Shape, VS

15.1 x 11.1 mm

$ 21.36

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1.60ct Yellow Citrine, Emerald Cut, VVS-VS

1.60ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 12.27

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0.02ct Black Diamond, Round, Opaque

0.02ct Black Diamond, Round, Opaque

1.9 mm (calibrated)

$ 15.94

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2.52ct Orange Moonstone, Marquise, Translucent

2.52ct Orange Moonstone, Marquise, Translucent

14 x 7 mm (calibrated)

$ 5.02

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1.50ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

1.50ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7.3 x 5.7 mm

$ 22.31

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1.21ctw Orange Zircon, Oval, VS

1.21ctw Orange Zircon, Oval, VS

5.2 x 4 mm

$ 30.13

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3.64ct Multicolor Pietersite, Cushion, Opaque

3.64ct Multicolor Pietersite, Cushion, Opaque

12 x 10 mm (calibrated)

$ 8.81

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4.34ctw Multicolor Spectrolite, Oval, Opaque

4.34ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 16.53

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127.53ct Pink Rose Quartz, Oval, Transparent
Rose Quartz Product Video (521476)

127.53ct Pink Rose Quartz, Oval, Transparent

31.9 x 29.5 mm

$ 279.44

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7.34ct Yellow Apatite, Oval, VS
Apatite Product Video (385927)

7.34ct Yellow Apatite, Oval, VS

14.7 x 11.6 mm

$ 387.61

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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

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

love the site, the experience and the products.

Posted By Ckingpots in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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