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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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14.86ctw Yellow Citrine, Emerald Cut, VVS

14.86ctw Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 95.57

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24.29ct Multicolor Labradorite, Oval, Opaque

24.29ct Multicolor Labradorite, Oval, Opaque

29.2 x 16.5 mm

$ 21.77

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1.49ct Gray Sillimanite Cat'S Eye, Oval, Translucent

1.49ct Gray Sillimanite Cat'S Eye, Oval, Translucent

6.4 x 5.9 mm

$ 4.45

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4.60ctw Yellow Citrine, Oval, VVS

4.60ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 25.20

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2.18ctw Pink Tourmaline, Round, Transparent

2.18ctw Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 36.14

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3.06ctw White Topaz, Cushion, VVS-VS

3.06ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 16.77

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2.74ct Pink Morganite, Pear Shape, Transparent

2.74ct Pink Morganite, Pear Shape, Transparent

12 x 8 mm (calibrated)

$ 31.48

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36.47ct White Rainbow Moonstone, Pear Shape, Translucent

36.47ct White Rainbow Moonstone, Pear Shape, Translucent

28.6 x 20.5 mm

$ 254.27

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1.27ct Orange Hessonite Garnet, Oval, VVS-VS

1.27ct Orange Hessonite Garnet, Oval, VVS-VS

7.5 x 5.6 mm

$ 19.41

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0.98ct Multicolor Opal, Oval, Translucent

0.98ct Multicolor Opal, Oval, Translucent

10 x 8 mm (calibrated)

$ 24.40

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8.91ct Pink Morganite, Pear Shape, Translucent

8.91ct Pink Morganite, Pear Shape, Translucent

18 x 13 mm (calibrated)

$ 97.62

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6.11ct Yellow Citrine, Oval, VVS-VS

6.11ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 36.69

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1.20ct Pink Morganite, Round, VS

1.20ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 46.61

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14.30ct Violet Amethyst, Emerald Cut, VVS
Amethyst Product Video (713705)

14.30ct Violet Amethyst, Emerald Cut, VVS

18 x 13 mm (calibrated)

$ 99.70

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75.60ct Multicolor Jasper, Cushion, Opaque

75.60ct Multicolor Jasper, Cushion, Opaque

37.9 x 31.4 mm

$ 43.67

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1.80ct Green Tourmaline, Cushion, VS

1.80ct Green Tourmaline, Cushion, VS

7.8 x 6.3 mm

$ 209.16

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3.60ct Pink Tourmaline, Emerald Cut, SI

3.60ct Pink Tourmaline, Emerald Cut, SI

9 x 7 mm (calibrated)

$ 161.35

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8.27ct Multicolor Boulder Opal, Fancy, Opaque

8.27ct Multicolor Boulder Opal, Fancy, Opaque

27.2 x 8.3 mm

$ 41.18

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1.73ct Blue Kyanite, Oval, VS-SI

1.73ct Blue Kyanite, Oval, VS-SI

8 x 6 mm (calibrated)

$ 37.91

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3.52ct Yellow Citrine, Oval, VS

3.52ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 24.54

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5.08ct Yellow Citrine, Oval, VVS-VS

5.08ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 30.49

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1.67ct Orange Moonstone, Trillion, Translucent

1.67ct Orange Moonstone, Trillion, Translucent

8.1 x 7.7 mm

$ 3.33

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5.17ctw Multicolor Opal, Square, Transparent

5.17ctw Multicolor Opal, Square, Transparent

4.9 x 4.6 mm

$ 36.70

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14.51ctw Multicolor Pietersite, Oval, Opaque

14.51ctw Multicolor Pietersite, Oval, Opaque

13.4 x 9.9 mm

$ 63.59

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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 -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

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 -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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