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Home › Gemstones › Untreated Gemstones

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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Untreated Gemstones Treatment

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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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3.06ct Violet Amethyst, Trillion, VVS-VS

3.06ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 24.39

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32.97ctw Multicolor Moss Agate, Fancy, Transparent

32.97ctw Multicolor Moss Agate, Fancy, Transparent

30.4 x 15.1 mm

$ 32.83

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6.34ct Yellow Rutile Quartz, Pear Shape, Translucent

6.34ct Yellow Rutile Quartz, Pear Shape, Translucent

15.1 x 10.8 mm

$ 17.22

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24.94ct Green Aventurine, Fancy, Opaque

24.94ct Green Aventurine, Fancy, Opaque

34.2 x 9.8 mm

$ 2.07

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18.22ct Green Bloodstone, Oval, Opaque

18.22ct Green Bloodstone, Oval, Opaque

18 x 13.9 mm

$ 39.92

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0.80ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.80ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.9 x 4.5 mm

$ 29.71

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2.09ct Orange Hessonite Garnet, Oval, VS-SI
Hessonite Garnet Product Video (594674)

2.09ct Orange Hessonite Garnet, Oval, VS-SI

8.4 x 7.1 mm

$ 41.22

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39.96ctw Multicolor Rhodochrosite, Fancy, Translucent

39.96ctw Multicolor Rhodochrosite, Fancy, Translucent

23.4 x 14.3 mm

$ 52.54

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0.30ct Violet Amethyst, Emerald Cut, VS

0.30ct Violet Amethyst, Emerald Cut, VS

5.1 x 3.2 mm

$ 1.74

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10.02ct Green Maw-Sit-Sit, Round, Opaque

10.02ct Green Maw-Sit-Sit, Round, Opaque

12 mm (calibrated)

$ 23.37

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24.41ctw Multicolor Fossil Coral, Fancy, Opaque

24.41ctw Multicolor Fossil Coral, Fancy, Opaque

24 x 11.9 mm

$ 26.74

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1.34ct Orange Fire Opal, Oval, Transparent
Fire Opal Product Video (674092)

1.34ct Orange Fire Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 46.71

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2.61ctw Orange Moonstone, Cushion, Transparent

2.61ctw Orange Moonstone, Cushion, Transparent

8 x 6 mm (calibrated)

$ 5.72

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13.26ct Red Star Garnet, Oval, Opaque

13.26ct Red Star Garnet, Oval, Opaque

13.4 x 11.5 mm

$ 13.08

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0.15ctw White Diamond, Round, VVS-VS

0.15ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 247.76

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31.51ct Multicolor Chrysocolla, Pear Shape, Opaque

31.51ct Multicolor Chrysocolla, Pear Shape, Opaque

29.8 x 17.7 mm

$ 32.96

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28.85ct Green Serpentine, Oval, Translucent
Serpentine Product Video (671447)

28.85ct Green Serpentine, Oval, Translucent

24.2 x 17 mm

$ 61.79

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5.98ct Green Quartz Cat'S Eye, Oval, Opaque

5.98ct Green Quartz Cat'S Eye, Oval, Opaque

11.9 x 8.9 mm

$ 19.65

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3.09ct Yellow Citrine, Oval, VS

3.09ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 23.70

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1.86ct Red Hessonite Garnet, Cushion, VS

1.86ct Red Hessonite Garnet, Cushion, VS

8 x 6 mm (calibrated)

$ 37.05

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27.04ct Brown Tiger'S Eye, Fancy, Opaque

27.04ct Brown Tiger'S Eye, Fancy, Opaque

33.3 x 10.7 mm

$ 2.69

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1.53ct Orange Citrine, Oval, VVS

1.53ct Orange Citrine, Oval, VVS

9 x 7 mm (calibrated)

$ 15.24

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2.71ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.71ctw White Sillimanite Cat'S Eye, Oval, Translucent

7 x 5 mm (calibrated)

$ 10.75

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5.48ct Multicolor Rainbow Pyrite, Marquise, Opaque

5.48ct Multicolor Rainbow Pyrite, Marquise, Opaque

20.7 x 8.1 mm

$ 14.19

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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

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
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Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
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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
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Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
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Overall Rating -> 10 star ratings

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate
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