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Home › Gemstones › Untreated Gemstones

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 Orange Hessonite Garnet, Emerald Cut, VS-SI

1.64ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7.2 x 5.6 mm

$ 24.39

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0.72ct Green Chrome Diopside, Oval, VVS-VS
Chrome Diopside Product Video (724482)

0.72ct Green Chrome Diopside, Oval, VVS-VS

7 x 4.6 mm

$ 14.94

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4.00ct Multicolor Labradorite, Pear Shape, Translucent

4.00ct Multicolor Labradorite, Pear Shape, Translucent

11 x 9 mm (calibrated)

$ 8.85

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1.38ct Orange Moonstone, Marquise, Translucent

1.38ct Orange Moonstone, Marquise, Translucent

10 x 5.3 mm

$ 2.75

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45.84ct Blue Turquoise, Oval, Opaque

45.84ct Blue Turquoise, Oval, Opaque

28.8 x 23.1 mm

$ 136.97

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0.98ct Orange Sunstone, Oval, Translucent

0.98ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.83

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3.74ct Yellow Citrine, Pear Shape, VVS-VS

3.74ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 23.47

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1.46ct Multicolor Opal, Oval, Transparent

1.46ct Multicolor Opal, Oval, Transparent

11 x 7.4 mm

$ 63.98

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28.60ct White Jadeite, Fancy, Translucent

28.60ct White Jadeite, Fancy, Translucent

40 x 13.8 mm

$ 21.36

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0.62ct Violet Amethyst, Emerald Cut, VS

0.62ct Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 3.60

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3.99ctw Red Pyrope Garnet, Marquise, VVS-VS

3.99ctw Red Pyrope Garnet, Marquise, VVS-VS

12.2 x 6.1 mm

$ 39.47

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3.88ct Orange Spessartite Garnet, Pear Shape, Transparent

3.88ct Orange Spessartite Garnet, Pear Shape, Transparent

9.1 x 7.8 mm

$ 96.61

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1.00ct Blue Kyanite, Oval, SI

1.00ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 24.90

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4.26ct Red Almandine Garnet, Oval, VVS

4.26ct Red Almandine Garnet, Oval, VVS

10.7 x 8.2 mm

$ 148.50

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1.67ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.67ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 32.93

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11.75ct Multicolor Rainbow Pyrite, Oval, Opaque

11.75ct Multicolor Rainbow Pyrite, Oval, Opaque

18.5 x 12.2 mm

$ 30.31

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1.24ct Orange Clinohumite, Oval, SI
Clinohumite Product Video (735117)

1.24ct Orange Clinohumite, Oval, SI

8.4 x 6 mm

$ 61.75

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1.41ct Orange Hessonite Garnet, Oval, VS

1.41ct Orange Hessonite Garnet, Oval, VS

7.7 x 6.1 mm

$ 21.55

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2.32ct Green Malachite, Oval, Opaque

2.32ct Green Malachite, Oval, Opaque

8.9 x 6.7 mm

$ 1.78

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2.03ct Purple Rhodolite Garnet, Oval, VVS-VS
Rhodolite Garnet Product Video (735187)

2.03ct Purple Rhodolite Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 67.40

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3.56ctw Multicolor Opal, Square, Translucent

3.56ctw Multicolor Opal, Square, Translucent

3.8 x 3.6 mm

$ 25.28

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0.77ct Gray Sillimanite Cat'S Eye, Oval, Opaque

0.77ct Gray Sillimanite Cat'S Eye, Oval, Opaque

6.3 x 4 mm

$ 2.53

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10.50ct Multicolor Pietersite, Pear Shape, Opaque

10.50ct Multicolor Pietersite, Pear Shape, Opaque

20.2 x 12.3 mm

$ 25.73

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1.18ctw Green Peridot, Marquise, VS

1.18ctw Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 17.63

View Gem
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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 -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 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

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
→ View All GemSelect Reviews on Bizrate
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