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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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1.77ct Yellow Citrine, Emerald Cut, VVS

1.77ct Yellow Citrine, Emerald Cut, VVS

8.2 x 6.3 mm

$ 14.10

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4.59ct White Topaz, Round, VVS-VS

4.59ct White Topaz, Round, VVS-VS

10 mm (calibrated)

$ 21.37

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14.57ct Brown Tiger'S Eye, Oval, Opaque

14.57ct Brown Tiger'S Eye, Oval, Opaque

21.1 x 12.7 mm

$ 15.97

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11.05ct Multicolor Agate, Pear Shape, Opaque

11.05ct Multicolor Agate, Pear Shape, Opaque

18.5 x 11 mm

$ 10.46

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1.11ct Orange Moonstone, Marquise, Translucent

1.11ct Orange Moonstone, Marquise, Translucent

9.4 x 4.9 mm

$ 2.21

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1.34ctw Red Rhodolite Garnet, Square, VS

1.34ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.74

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0.71ct Purple Spinel, Oval, VS

0.71ct Purple Spinel, Oval, VS

5.7 x 4.8 mm

$ 58.35

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0.94ct Yellow Sphalerite, Oval, SI

0.94ct Yellow Sphalerite, Oval, SI

5.7 x 4.7 mm

$ 46.81

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0.30ct Green Kornerupine, Oval, VS-SI

0.30ct Green Kornerupine, Oval, VS-SI

5 x 3.5 mm

$ 25.70

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0.57ct Green Tourmaline, Emerald Cut, VS

0.57ct Green Tourmaline, Emerald Cut, VS

4.4 x 4.2 mm

$ 28.39

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6.89ct Brown Smoky Quartz, Marquise, VVS

6.89ct Brown Smoky Quartz, Marquise, VVS

17.2 x 12 mm

$ 27.79

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3.16ct Pink Strawberry Quartz, Oval, Transparent

3.16ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 23.70

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4.16ct Pink Strawberry Quartz, Round, Translucent

4.16ct Pink Strawberry Quartz, Round, Translucent

11 mm (calibrated)

$ 31.91

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7.63ct Yellow Citrine, Emerald Cut, VVS-VS

7.63ct Yellow Citrine, Emerald Cut, VVS-VS

14 x 10 mm (calibrated)

$ 58.52

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2.42ct Orange Moonstone, Cushion, Translucent

2.42ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.82

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2.18ct White Opal, Oval, Transparent

2.18ct White Opal, Oval, Transparent

11 x 9 mm (calibrated)

$ 45.24

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12.56ctw Multicolor Jasper, Heart, Opaque

12.56ctw Multicolor Jasper, Heart, Opaque

21.8 x 11.2 mm

$ 13.76

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27.49ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

27.49ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

38.1 x 13.9 mm

$ 27.38

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0.50ct Orange Spessartite Garnet, Oval, VS

0.50ct Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 14.94

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5.56ct Brown Smoky Quartz, Round, Transparent
Smoky Quartz Product Video (618966)

5.56ct Brown Smoky Quartz, Round, Transparent

12 mm (calibrated)

$ 23.32

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9.77ct Multicolor Cinnabar, Cushion, Opaque

9.77ct Multicolor Cinnabar, Cushion, Opaque

16 x 16 mm (calibrated)

$ 11.44

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

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

7 x 5 mm (calibrated)

$ 29.58

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6.09ct Green Actinolite Cat'S Eye, Oval, Translucent

6.09ct Green Actinolite Cat'S Eye, Oval, Translucent

14.2 x 12.5 mm

$ 42.46

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1.21ct Green Tourmaline, Emerald Cut, VS

1.21ct Green Tourmaline, Emerald Cut, VS

18.9 x 3.4 mm

$ 31.81

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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

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
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

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

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
→ View All GemSelect Reviews on Bizrate
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