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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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3.92ct Pink Strawberry Quartz, Round, Translucent

3.92ct Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 23.62

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1.00ct Orange Zircon, Oval, VVS

1.00ct Orange Zircon, Oval, VVS

5.9 x 5 mm

$ 24.90

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3.88ctw Red Almandine Garnet, Baguette, VVS-VS

3.88ctw Red Almandine Garnet, Baguette, VVS-VS

10 x 5 mm

$ 135.26

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2.34ctw Red Pyrope Garnet, Marquise, VVS-VS

2.34ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.1 mm

$ 20.51

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27.79ct Multicolor Bloodstone, Oval, Opaque

27.79ct Multicolor Bloodstone, Oval, Opaque

20 x 15 mm (calibrated)

$ 55.36

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4.30ctw Multicolor Spectrolite, Oval, Opaque

4.30ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 19.66

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4.68ctw Green Prehnite, Round, Transparent

4.68ctw Green Prehnite, Round, Transparent

7.5 mm (calibrated)

$ 25.43

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0.86ct Yellow Color-Change Diaspore, Cushion, VVS-VS

0.86ct Yellow Color-Change Diaspore, Cushion, VVS-VS

6.3 x 4.9 mm

$ 45.40

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16.47ctw Green Aventurine, Fancy, Translucent

16.47ctw Green Aventurine, Fancy, Translucent

20.1 x 10.5 mm

$ 36.09

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42.74ct Green Aragonite, Baguette, Opaque

42.74ct Green Aragonite, Baguette, Opaque

28.7 x 18 mm

$ 50.02

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11.06ct Red Pyrope Garnet, Oval, VVS

11.06ct Red Pyrope Garnet, Oval, VVS

13.6 x 11.4 mm

$ 321.29

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0.90ct Green Peridot, Emerald Cut, VS

0.90ct Green Peridot, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 13.45

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1.92ct Violet Amethyst, Square, VVS-VS

1.92ct Violet Amethyst, Square, VVS-VS

7.6 x 7.5 mm

$ 14.72

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87.25ct Yellow Quartz, Pear Shape, VVS
Quartz Product Video (470297)

87.25ct Yellow Quartz, Pear Shape, VVS

31.8 x 25.2 mm

$ 119.49

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1.33ct White Rainbow Moonstone, Oval, Transparent

1.33ct White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 22.64

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0.63ct Pink Morganite, Oval, VS

0.63ct Pink Morganite, Oval, VS

7 x 5 mm (calibrated)

$ 27.61

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1.18ct Green Chrome Diopside, Marquise, VS-SI

1.18ct Green Chrome Diopside, Marquise, VS-SI

10 x 5 mm (calibrated)

$ 29.38

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28.97ct Multicolor Jasper, Pear Shape, Opaque

28.97ct Multicolor Jasper, Pear Shape, Opaque

26.5 x 24.3 mm

$ 17.77

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3.90ct Pink Strawberry Quartz, Oval, Translucent

3.90ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 23.51

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24.04ct White Howlite, Cushion, Opaque

24.04ct White Howlite, Cushion, Opaque

21.9 x 21.4 mm

$ 11.25

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2.09ct Yellow Citrine, Oval, VVS-VS

2.09ct Yellow Citrine, Oval, VVS-VS

10 x 7 mm (calibrated)

$ 16.03

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4.38ct Purple Rhodolite Garnet, Pear Shape, VVS-VS

4.38ct Purple Rhodolite Garnet, Pear Shape, VVS-VS

11 x 9 mm (calibrated)

$ 181.77

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6.39ct Multicolor Labradorite, Pear Shape, Translucent

6.39ct Multicolor Labradorite, Pear Shape, Translucent

14 x 10 mm (calibrated)

$ 14.13

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0.90ct Orange Sphalerite, Emerald Cut, SI-I1

0.90ct Orange Sphalerite, Emerald Cut, SI-I1

5 x 5 mm (calibrated)

$ 44.82

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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

I can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate
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