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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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2.74ct Pink Kunzite, Fancy, VS

2.74ct Pink Kunzite, Fancy, VS

9.5 x 6.7 mm

$ 68.23

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2.94ct Yellow Citrine, Oval, VS

2.94ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 20.50

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3.76ctw Orange Hessonite Garnet, Emerald Cut, VS

3.76ctw Orange Hessonite Garnet, Emerald Cut, VS

6.6 x 4.8 mm

$ 82.39

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8.68ct Multicolor Boulder Opal, Fancy, Opaque

8.68ct Multicolor Boulder Opal, Fancy, Opaque

20 x 15 mm (calibrated)

$ 43.23

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2.32ct Orange Hessonite Garnet, Oval, VS

2.32ct Orange Hessonite Garnet, Oval, VS

8.9 x 7.4 mm

$ 35.45

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0.73ct Pink Tourmaline, Round, Transparent

0.73ct Pink Tourmaline, Round, Transparent

4.8 mm

$ 24.24

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0.92ct Yellow Sphalerite, Round, VS-SI

0.92ct Yellow Sphalerite, Round, VS-SI

5.5 mm (calibrated)

$ 45.82

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10.57ctw Green Prehnite, Fancy, Translucent

10.57ctw Green Prehnite, Fancy, Translucent

15.8 x 10.9 mm

$ 17.38

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1.00ctw White Topaz, Oval, VVS

1.00ctw White Topaz, Oval, VVS

6 x 4 mm (calibrated)

$ 6.97

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2.55ct Green Peridot, Cushion, VS

2.55ct Green Peridot, Cushion, VS

8.5 x 6.6 mm

$ 101.04

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4.37ctw Multicolor Spectrolite, Oval, Opaque

4.37ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 19.98

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1.98ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458266)

1.98ctw Green Demantoid Garnet, Oval, VS

4.5 x 3.6 mm

$ 216.93

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17.01ct White Howlite, Fancy, Opaque

17.01ct White Howlite, Fancy, Opaque

24.1 x 18.9 mm

$ 8.13

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25.12ct Multicolor Jasper, Marquise, Opaque

25.12ct Multicolor Jasper, Marquise, Opaque

28.9 x 14 mm

$ 14.26

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0.71ct Pink Morganite, Pear Shape, VVS-VS

0.71ct Pink Morganite, Pear Shape, VVS-VS

7.9 x 4.6 mm

$ 42.79

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9.44ct Multicolor Fire Agate, Fancy, Opaque

9.44ct Multicolor Fire Agate, Fancy, Opaque

17.6 x 11.1 mm

$ 74.05

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3.96ct Multicolor Pietersite, Trillion, Opaque

3.96ct Multicolor Pietersite, Trillion, Opaque

13.1 x 12.3 mm

$ 9.58

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1.34ct Orange Hessonite Garnet, Cushion, VS-SI

1.34ct Orange Hessonite Garnet, Cushion, VS-SI

6 x 6 mm (calibrated)

$ 22.02

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27.04ct Multicolor Labradorite, Oval, Translucent
Labradorite Product Video (501455)

27.04ct Multicolor Labradorite, Oval, Translucent

31.4 x 22 mm

$ 94.21

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0.81ct Yellow Color-Change Diaspore, Marquise, VS

0.81ct Yellow Color-Change Diaspore, Marquise, VS

10.2 x 4.6 mm

$ 29.03

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1.89ctw Green Demantoid Garnet, Oval, VS

1.89ctw Green Demantoid Garnet, Oval, VS

4.6 x 3.5 mm

$ 207.07

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1.26ct Yellow Citrine, Emerald Cut, VVS

1.26ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 10.04

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2.30ct Orange Hessonite Garnet, Oval, SI

2.30ct Orange Hessonite Garnet, Oval, SI

8.8 x 7.3 mm

$ 42.84

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2.59ct Yellow Citrine, Square, VVS-VS

2.59ct Yellow Citrine, Square, VVS-VS

8 x 8 mm (calibrated)

$ 15.15

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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

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 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

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate
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