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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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13.07ct Multicolor Agate, Fancy, Translucent

13.07ct Multicolor Agate, Fancy, Translucent

18.9 x 8.1 mm

$ 22.89

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1.50ct Orange Hessonite Garnet, Emerald Cut, VS

1.50ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 22.31

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9.12ct Multicolor Agate, Fancy, Translucent

9.12ct Multicolor Agate, Fancy, Translucent

15 x 7.9 mm

$ 15.97

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0.78ct Red Malaya Garnet, Cushion, VS

0.78ct Red Malaya Garnet, Cushion, VS

6 x 4 mm (calibrated)

$ 34.18

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1.44ct Pink Morganite, Round, VVS-VS

1.44ct Pink Morganite, Round, VVS-VS

7.5 mm (calibrated)

$ 110.44

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2.60ct Violet Amethyst, Trillion, VS

2.60ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 20.72

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13.22ct Green Maw-Sit-Sit, Round, Opaque

13.22ct Green Maw-Sit-Sit, Round, Opaque

14 mm (calibrated)

$ 40.84

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4.43ct Yellow Citrine, Emerald Cut, VVS

4.43ct Yellow Citrine, Emerald Cut, VVS

11 x 9 mm (calibrated)

$ 33.97

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7.76ct Multicolor Ruby-Zoisite, Baguette, Opaque

7.76ct Multicolor Ruby-Zoisite, Baguette, Opaque

13 x 11 mm (calibrated)

$ 21.26

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16.66ct Multicolor Labradorite, Pear Shape, Translucent

16.66ct Multicolor Labradorite, Pear Shape, Translucent

20 x 15 mm (calibrated)

$ 36.84

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0.96ct Pink Morganite, Pear Shape, VS

0.96ct Pink Morganite, Pear Shape, VS

8.8 x 4.9 mm

$ 57.85

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1.11ct Yellow Citrine, Emerald Cut, VVS-VS

1.11ct Yellow Citrine, Emerald Cut, VVS-VS

7.7 x 5.7 mm

$ 7.74

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1.01ct Pink Tourmaline, Round, Transparent

1.01ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 16.74

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1.55ct Blue Kyanite, Oval, SI

1.55ct Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 30.88

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3.35ctw Multicolor Opal, Square, Transparent

3.35ctw Multicolor Opal, Square, Transparent

4 x 4 mm (calibrated)

$ 23.79

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8.91ct Brown Smoky Quartz, Round, VVS-VS

8.91ct Brown Smoky Quartz, Round, VVS-VS

15 mm (calibrated)

$ 10.84

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1.58ct Violet Amethyst, Trillion, VS

1.58ct Violet Amethyst, Trillion, VS

8 x 8 mm (calibrated)

$ 10.44

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1.19ct Green Peridot, Oval, VS

1.19ct Green Peridot, Oval, VS

7.7 x 6 mm

$ 13.04

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1.86ct Green Sphene, Oval, Transparent

1.86ct Green Sphene, Oval, Transparent

8.2 x 6.3 mm

$ 9.26

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10.08ctw Green Jadeite, Oval, Opaque
Jadeite Product Video (643533)

10.08ctw Green Jadeite, Oval, Opaque

12 x 10 mm (calibrated)

$ 74.74

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70.52ct Multicolor Chrysocolla, Pear Shape, Opaque
Chrysocolla Product Video (658693)

70.52ct Multicolor Chrysocolla, Pear Shape, Opaque

46.8 x 30.9 mm

$ 120.11

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8.37ct Green Malachite, Oval, Opaque

8.37ct Green Malachite, Oval, Opaque

14 x 10 mm (calibrated)

$ 8.33

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0.67ct Orange Fire Opal, Oval, Translucent

0.67ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 18.36

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7.28ct Violet Amethyst, Pear Shape, VS

7.28ct Violet Amethyst, Pear Shape, VS

16 x 12 mm (calibrated)

$ 55.83

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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

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
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

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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