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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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12.48ct White Rainbow Moonstone, Pear Shape, Translucent

12.48ct White Rainbow Moonstone, Pear Shape, Translucent

21.1 x 10.7 mm

$ 87.01

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0.51ct Yellow Citrine, Marquise, VVS-VS

0.51ct Yellow Citrine, Marquise, VVS-VS

8.1 x 4.3 mm

$ 3.55

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7.88ct Yellow Apatite, Oval, VS
Apatite Product Video (407294)

7.88ct Yellow Apatite, Oval, VS

15.2 x 12 mm

$ 325.48

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1.74ct Orange Hessonite Garnet, Oval, VS

1.74ct Orange Hessonite Garnet, Oval, VS

8.2 x 6.4 mm

$ 30.97

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1.35ct Pink Morganite, Oval, VVS

1.35ct Pink Morganite, Oval, VVS

8.3 x 6.4 mm

$ 59.16

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27.38ctw Multicolor Fossil Coral, Fancy, Opaque

27.38ctw Multicolor Fossil Coral, Fancy, Opaque

22.8 x 13.2 mm

$ 35.40

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2.22ct Orange Zircon, Oval, VVS

2.22ct Orange Zircon, Oval, VVS

8.2 x 6.6 mm

$ 60.81

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1.60ct Brown Smoky Quartz, Round, VS-SI

1.60ct Brown Smoky Quartz, Round, VS-SI

7.5 mm (calibrated)

$ 7.01

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1.75ct Violet Amethyst, Pear Shape, VVS-VS

1.75ct Violet Amethyst, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 13.43

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2.67ct Red Almandine Garnet, Pear Shape, VVS

2.67ct Red Almandine Garnet, Pear Shape, VVS

12 x 8 mm (calibrated)

$ 22.16

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2.76ct Violet Amethyst, Trillion, VS-SI

2.76ct Violet Amethyst, Trillion, VS-SI

10 x 10 mm (calibrated)

$ 20.68

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0.83ct White Sillimanite Cat'S Eye, Oval, Transparent

0.83ct White Sillimanite Cat'S Eye, Oval, Transparent

7 x 5.4 mm

$ 2.60

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1.61ctw Red Pyrope Garnet, Heart, VVS-VS

1.61ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 12.35

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7.43ct Yellow Rutile Quartz, Pear Shape, Transparent

7.43ct Yellow Rutile Quartz, Pear Shape, Transparent

15 x 11 mm

$ 20.19

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1.44ct Green Tsavorite Garnet, Heart, VVS-VS
Tsavorite Garnet Product Video (749861)

1.44ct Green Tsavorite Garnet, Heart, VVS-VS

8.8 x 6.3 mm

$ 776.88

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2.98ctw White Topaz, Cushion, VVS-VS

2.98ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 16.33

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0.15ct Yellow Diamond, Round, VS-SI
Diamond Product Video (543909)

0.15ct Yellow Diamond, Round, VS-SI

3.3 mm

$ 270.60

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2.83ct Yellow Citrine, Square, VVS-VS

2.83ct Yellow Citrine, Square, VVS-VS

8 x 8 mm (calibrated)

$ 16.55

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9.57ct Multicolor Agate, Oval, Opaque

9.57ct Multicolor Agate, Oval, Opaque

17 x 11.9 mm

$ 16.20

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1.61ct White Rainbow Moonstone, Oval, Transparent

1.61ct White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 51.31

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0.42ct Yellow Citrine, Heart, VS

0.42ct Yellow Citrine, Heart, VS

5 x 5 mm (calibrated)

$ 2.93

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3.50ct Yellow Citrine, Cushion, VVS

3.50ct Yellow Citrine, Cushion, VVS

12 x 8 mm (calibrated)

$ 26.84

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29.35ctw Multicolor Jasper, Pear Shape, Opaque

29.35ctw Multicolor Jasper, Pear Shape, Opaque

34.8 x 13.7 mm

$ 46.63

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1.17ct Purple Rhodolite Garnet, Oval, VVS

1.17ct Purple Rhodolite Garnet, Oval, VVS

7.3 x 5.5 mm

$ 40.79

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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 -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie 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

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate
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