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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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Yellow Untreated Gemstones
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115.90ct Violet Amethyst, Square, Opaque
Amethyst Product Video (753205)

115.90ct Violet Amethyst, Square, Opaque

27.6 x 27.6 mm

$ 96.20

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18.47ctw Multicolor Jasper, Trillion, Opaque

18.47ctw Multicolor Jasper, Trillion, Opaque

19.7 x 16 mm

$ 10.86

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3.06ct Violet Amethyst, Trillion, VVS-VS

3.06ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 20.12

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1.21ct Orange Hessonite Garnet, Pear Shape, VS-SI

1.21ct Orange Hessonite Garnet, Pear Shape, VS-SI

8 x 5.7 mm

$ 22.70

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2.67ct Purple Rhodolite Garnet, Oval, VVS
Rhodolite Garnet Product Video (735228)

2.67ct Purple Rhodolite Garnet, Oval, VVS

9.1 x 6.5 mm

$ 106.37

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10.75ct Multicolor Cinnabar, Cushion, Opaque

10.75ct Multicolor Cinnabar, Cushion, Opaque

17 x 17 mm (calibrated)

$ 12.58

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3.61ctw Brown Smoky Quartz, Round, VS

3.61ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 15.82

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2.30ct Pink Tourmaline, Emerald Cut, VS

2.30ct Pink Tourmaline, Emerald Cut, VS

9 x 6 mm (calibrated)

$ 113.39

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1.80ctw Green Demantoid Garnet, Oval, VS

1.80ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 197.21

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1.15ct Yellow Beryl, Oval, VVS-VS

1.15ct Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 22.91

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4.13ct Green Malachite, Oval, Opaque

4.13ct Green Malachite, Oval, Opaque

10 x 8 mm (calibrated)

$ 4.12

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2.19ctw Pink Morganite, Pear Shape, VVS-VS
Morganite Product Video (460763)

2.19ctw Pink Morganite, Pear Shape, VVS-VS

7.8 x 4.1 mm

$ 191.95

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1.59ct Orange Hessonite Garnet, Square, VS-SI

1.59ct Orange Hessonite Garnet, Square, VS-SI

6 x 6 mm (calibrated)

$ 30.03

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1.06ct Yellow Citrine, Square, VVS-VS

1.06ct Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 7.39

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1.20ct Orange Sunstone, Oval, Translucent

1.20ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 8.37

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19.54ctw Multicolor Fossil Coral, Pear Shape, Opaque

19.54ctw Multicolor Fossil Coral, Pear Shape, Opaque

17.9 x 10.6 mm

$ 38.54

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2.41ctw Orange Zircon, Round, VVS-VS
Zircon Product Video (481429)

2.41ctw Orange Zircon, Round, VVS-VS

6 mm (calibrated)

$ 57.49

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0.84ct Green Sphene, Oval, Transparent

0.84ct Green Sphene, Oval, Transparent

5.9 x 5 mm

$ 4.18

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1.06ct Pink Strawberry Quartz, Round, Transparent

1.06ct Pink Strawberry Quartz, Round, Transparent

7 mm (calibrated)

$ 9.30

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0.93ct Purple Spinel, Oval, VS

0.93ct Purple Spinel, Oval, VS

6.7 x 5.1 mm

$ 76.43

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3.57ct Turquoise Grandidierite, Oval, VS-SI
Grandidierite Product Video (561055)

3.57ct Turquoise Grandidierite, Oval, VS-SI

11 x 9 mm (calibrated)

$ 156.46

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17.15ctw Multicolor Jasper, Fancy, Opaque

17.15ctw Multicolor Jasper, Fancy, Opaque

22 x 12.6 mm

$ 9.74

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2.16ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.16ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8 x 6 mm (calibrated)

$ 40.52

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24.04ct Brown Tiger'S Eye, Oval, Opaque

24.04ct Brown Tiger'S Eye, Oval, Opaque

27 x 20 mm (calibrated)

$ 21.07

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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

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 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

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
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

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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