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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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8.01ct Multicolor Rainbow Pyrite, Fancy, Opaque

8.01ct Multicolor Rainbow Pyrite, Fancy, Opaque

21.4 x 16.5 mm

$ 20.75

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8.90ct Multicolor Boulder Opal, Pear Shape, Opaque

8.90ct Multicolor Boulder Opal, Pear Shape, Opaque

21.5 x 13.3 mm

$ 36.94

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2.29ct Red Pyrope Garnet, Square, VVS-VS

2.29ct Red Pyrope Garnet, Square, VVS-VS

7 x 7 mm (calibrated)

$ 20.07

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3.94ctw Orange Zircon, Round, VVS-VS

3.94ctw Orange Zircon, Round, VVS-VS

7 mm (calibrated)

$ 71.94

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1.58ctw Red Rhodolite Garnet, Square, VS

1.58ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.83

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3.02ctw Multicolor Andalusite, Round, VS

3.02ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 132.78

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36.81ct Violet Amethyst, Oval, VVS
Amethyst Product Video (734684)

36.81ct Violet Amethyst, Oval, VVS

25 x 17.3 mm

$ 244.42

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2.83ctw White Rainbow Moonstone, Square, Transparent

2.83ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 44.70

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14.40ct Multicolor Obsidian, Oval, Opaque

14.40ct Multicolor Obsidian, Oval, Opaque

24.4 x 15.5 mm

$ 10.76

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2.70ctw Green Tsavorite Garnet, Square, VVS-VS
Tsavorite Garnet Product Video (346227)

2.70ctw Green Tsavorite Garnet, Square, VVS-VS

2.4 x 2.3 mm

$ 251.44

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0.18ct Violet Iolite, Emerald Cut, VS-SI

0.18ct Violet Iolite, Emerald Cut, VS-SI

5 x 3 mm (calibrated)

$ 7.17

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3.38ctw Orange Citrine, Pear Shape, VVS-VS

3.38ctw Orange Citrine, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 28.05

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0.72ct Yellow Color-Change Diaspore, Oval, VS

0.72ct Yellow Color-Change Diaspore, Oval, VS

5.4 x 4.9 mm

$ 26.65

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4.91ct Yellow Citrine, Oval, VVS

4.91ct Yellow Citrine, Oval, VVS

12.8 x 10.1 mm

$ 29.75

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4.76ctw Violet Amethyst, Oval, Transparent

4.76ctw Violet Amethyst, Oval, Transparent

10 x 8 mm (calibrated)

$ 26.08

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0.62ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.62ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6.4 x 4.2 mm

$ 19.73

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1.25ctw Yellow Citrine, Pear Shape, VVS

1.25ctw Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 9.96

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0.51ct Orange Sphalerite, Round, SI-I1

0.51ct Orange Sphalerite, Round, SI-I1

4.5 mm (calibrated)

$ 25.40

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2.49ct Multicolor Labradorite, Pear Shape, Translucent

2.49ct Multicolor Labradorite, Pear Shape, Translucent

10.2 x 7.4 mm

$ 5.51

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0.70ct Orange Spessartite Garnet, Oval, SI-I1

0.70ct Orange Spessartite Garnet, Oval, SI-I1

6.3 x 4.6 mm

$ 23.70

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12.08ct Yellow Citrine, Oval, VVS

12.08ct Yellow Citrine, Oval, VVS

18 x 13 mm (calibrated)

$ 66.18

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2.18ctw Yellow Sphene, Oval, Transparent

2.18ctw Yellow Sphene, Oval, Transparent

6.3 x 5.8 mm

$ 10.86

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26.57ct Multicolor Jasper, Fancy, Opaque

26.57ct Multicolor Jasper, Fancy, Opaque

37 x 9.6 mm

$ 7.93

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2.17ct Orange Sunstone, Oval, Translucent

2.17ct Orange Sunstone, Oval, Translucent

9.4 x 7.7 mm

$ 12.96

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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

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about 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

The website was very easy to use.

Posted By Garnet in January, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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