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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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15.08ct Green Opal, Oval, Opaque

15.08ct Green Opal, Oval, Opaque

17.1 x 15.8 mm

$ 32.29

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15.35ct Pink Rose Quartz, Oval, Transparent/Translucent

15.35ct Pink Rose Quartz, Oval, Transparent/Translucent

16.8 x 13.8 mm

$ 21.87

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10.31ct White Rose Quartz, Flower Cut, Transparent

10.31ct White Rose Quartz, Flower Cut, Transparent

21.8 x 21.6 mm

$ 22.59

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1.20ct Yellow Beryl, Oval, VVS

1.20ct Yellow Beryl, Oval, VVS

8 x 6 mm (calibrated)

$ 29.88

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4.50ct Orange Sunstone, Oval, Translucent

4.50ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 24.65

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0.84ctw Yellow Citrine, Oval, VS

0.84ctw Yellow Citrine, Oval, VS

6 x 4 mm (calibrated)

$ 4.60

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0.67ct Yellow Citrine, Trillion, VS-SI

0.67ct Yellow Citrine, Trillion, VS-SI

6.5 x 6.1 mm

$ 5.56

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21.55ct Pink Coral, Fancy, Opaque
Coral Product Video (333715)

21.55ct Pink Coral, Fancy, Opaque

24.7 x 15.4 mm

$ 306.93

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1.46ct Orange Zircon, Oval, VVS

1.46ct Orange Zircon, Oval, VVS

7.2 x 5.8 mm

$ 39.99

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22.80ct Green Jadeite, Fancy, Translucent

22.80ct Green Jadeite, Fancy, Translucent

26.5 x 13.7 mm

$ 13.49

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2.61ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.61ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8.3 x 6.9 mm

$ 51.48

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2.33ct Brown Tiger'S Eye, Round, Opaque

2.33ct Brown Tiger'S Eye, Round, Opaque

8 mm (calibrated)

$ 2.32

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5.01ct Pink Rose Quartz, Emerald Cut, Transparent

5.01ct Pink Rose Quartz, Emerald Cut, Transparent

10.5 x 10.5 mm

$ 27.45

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23.20ct Multicolor Jasper, Oval, Opaque

23.20ct Multicolor Jasper, Oval, Opaque

29 x 20.4 mm

$ 14.48

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2.15ct Yellow Beryl, Oval, VVS-VS

2.15ct Yellow Beryl, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 42.83

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78.93ct Multicolor Jasper, Oval, Opaque

78.93ct Multicolor Jasper, Oval, Opaque

51.8 x 26.1 mm

$ 38.91

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2.23ct Red Almandine Garnet, Oval, VVS-VS

2.23ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 83.29

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42.34ct Multicolor Jasper, Oval, Opaque

42.34ct Multicolor Jasper, Oval, Opaque

27.5 x 20.9 mm

$ 26.44

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7.32ctw White Topaz, Square, VVS-VS

7.32ctw White Topaz, Square, VVS-VS

5 x 5 mm (calibrated)

$ 53.22

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6.24ctw Brown Moonstone, Flower Cut, Translucent

6.24ctw Brown Moonstone, Flower Cut, Translucent

8 x 8 mm (calibrated)

$ 27.35

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3.90ct Orange Sunstone, Oval, Translucent

3.90ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 23.21

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3.36ct Green Prehnite, Pear Shape, Transparent

3.36ct Green Prehnite, Pear Shape, Transparent

12.5 x 7.3 mm

$ 9.20

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14.32ct Yellow Citrine, Oval, VVS

14.32ct Yellow Citrine, Oval, VVS

16.3 x 13.3 mm

$ 95.08

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22.13ct Multicolor Jasper, Fancy, Opaque

22.13ct Multicolor Jasper, Fancy, Opaque

36.4 x 15.2 mm

$ 29.10

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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

Was a good experience.

Posted By Tim 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

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
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 -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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