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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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8.80ct Green Prehnite, Fancy, Translucent

8.80ct Green Prehnite, Fancy, Translucent

16.3 x 11.1 mm

$ 14.46

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1.17ct Yellow Citrine, Emerald Cut, VVS-VS

1.17ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 8.16

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2.15ct Red Almandine Garnet, Oval, VVS

2.15ct Red Almandine Garnet, Oval, VVS

9 x 7 mm (calibrated)

$ 80.30

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6.92ct Multicolor Labradorite, Round, Translucent

6.92ct Multicolor Labradorite, Round, Translucent

13 mm (calibrated)

$ 14.89

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1.53ctw Yellow Citrine, Heart, VVS-VS

1.53ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 11.74

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1.70ctw Green Tsavorite Garnet, Round, VVS-VS

1.70ctw Green Tsavorite Garnet, Round, VVS-VS

2.6 mm (calibrated)

$ 142.53

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0.69ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

0.69ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

9.6 x 4.3 mm

$ 24.19

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1.02ct Violet Amethyst, Emerald Cut, VS

1.02ct Violet Amethyst, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 8.13

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3.84ctw Purple Rhodolite Garnet, Oval, VS

3.84ctw Purple Rhodolite Garnet, Oval, VS

7 x 4.7 mm

$ 81.66

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2.10ct Orange Hessonite Garnet, Oval, VS-SI

2.10ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 38.34

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2.82ct Violet Amethyst, Trillion, VVS-VS

2.82ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.66

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0.62ct Yellow Beryl, Oval, VVS

0.62ct Yellow Beryl, Oval, VVS

7 x 5 mm (calibrated)

$ 15.44

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1.00ctw Red Pyrope Garnet, Heart, VS

1.00ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 7.97

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1.85ct Yellow Citrine, Round, VVS

1.85ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.90

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5.52ctw Orange Sunstone, Round, Translucent

5.52ctw Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 32.66

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2.53ctw Orange Hessonite Garnet, Round, VS

2.53ctw Orange Hessonite Garnet, Round, VS

6 mm (calibrated)

$ 40.99

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4.11ct Yellow Rutile Quartz, Oval, Transparent

4.11ct Yellow Rutile Quartz, Oval, Transparent

12.3 x 8.3 mm

$ 11.26

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18.31ct Black Nuummite, Oval, Opaque

18.31ct Black Nuummite, Oval, Opaque

18.7 x 16.1 mm

$ 80.43

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0.68ct Green Tourmaline, Emerald Cut, VVS-VS

0.68ct Green Tourmaline, Emerald Cut, VVS-VS

6.5 x 3.5 mm

$ 33.86

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1.16ct Yellow Citrine, Emerald Cut, VVS-VS

1.16ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 8.08

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7.22ct Yellow Rutile Quartz, Round, Transparent

7.22ct Yellow Rutile Quartz, Round, Transparent

13 mm (calibrated)

$ 25.08

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1.86ct Orange Hessonite Garnet, Oval, VS-SI

1.86ct Orange Hessonite Garnet, Oval, VS-SI

8.5 x 6.8 mm

$ 32.46

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6.52ct Purple Kunzite, Oval, VVS-VS

6.52ct Purple Kunzite, Oval, VVS-VS

14.6 x 7.5 mm

$ 178.58

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13.90ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (450376)

13.90ct Blue Aquamarine, Emerald Cut, VVS

25.6 x 8.4 mm

$ 2,307.40

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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

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 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
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Overall Rating -> 10 star ratings

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 2025
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Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate
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