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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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30.95ct White Dendritic Agate, Fancy, Opaque

30.95ct White Dendritic Agate, Fancy, Opaque

27.9 x 16 mm

$ 21.58

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1.57ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.57ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 30.97

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1.67ct Red Almandine Garnet, Baguette, VVS

1.67ct Red Almandine Garnet, Baguette, VVS

10 x 5 mm

$ 62.37

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28.40ct Black Snowflake Obsidian, Baguette, Opaque

28.40ct Black Snowflake Obsidian, Baguette, Opaque

25.5 x 17 mm

$ 18.67

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4.10ctw Violet Amethyst, Oval, VS

4.10ctw Violet Amethyst, Oval, VS

6 x 4 mm (calibrated)

$ 26.95

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3.72ctw Orange Hessonite Garnet, Square, VS-SI

3.72ctw Orange Hessonite Garnet, Square, VS-SI

7 x 7 mm (calibrated)

$ 81.51

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1.49ctw Orange Fire Opal, Oval, Transparent

1.49ctw Orange Fire Opal, Oval, Transparent

8 x 6 mm (calibrated)

$ 32.65

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5.55ctw Orange Sunstone, Oval, Translucent

5.55ctw Orange Sunstone, Oval, Translucent

10 x 8 mm (calibrated)

$ 42.57

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5.11ct Multicolor Opal, Oval, Translucent

5.11ct Multicolor Opal, Oval, Translucent

14 x 10 mm (calibrated)

$ 127.24

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1.53ct Yellow Citrine, Emerald Cut, VS

1.53ct Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 12.19

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2.81ctw Violet Amethyst, Trillion, VS

2.81ctw Violet Amethyst, Trillion, VS

7 x 6.2 mm

$ 18.48

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0.17ctw White Diamond, Round, VVS-VS
Diamond Product Video (567443)

0.17ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 303.91

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1.65ctw Red Pyrope Garnet, Square, VVS-VS

1.65ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 12.66

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1.02ct White Rainbow Moonstone, Oval, Transparent

1.02ct White Rainbow Moonstone, Oval, Transparent

7.1 x 6 mm

$ 18.17

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1.66ct Orange Hessonite Garnet, Oval, VS

1.66ct Orange Hessonite Garnet, Oval, VS

7.9 x 6.4 mm

$ 27.28

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5.50ct White Topaz, Round, VVS

5.50ct White Topaz, Round, VVS

10 mm (calibrated)

$ 30.13

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2.01ct Green Peridot, Cushion, VS

2.01ct Green Peridot, Cushion, VS

7.9 x 7.2 mm

$ 78.84

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5.27ctw White Topaz, Cushion, VVS-VS

5.27ctw White Topaz, Cushion, VVS-VS

4.7 x 4.6 mm

$ 28.88

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1.40ct Yellow Sphene, Oval, Transparent

1.40ct Yellow Sphene, Oval, Transparent

6.7 x 5.7 mm

$ 6.97

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2.57ctw Yellow Sphene, Oval, Transparent

2.57ctw Yellow Sphene, Oval, Transparent

7.2 x 6 mm

$ 12.80

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3.96ct Multicolor Opal, Oval, Translucent

3.96ct Multicolor Opal, Oval, Translucent

13 x 9 mm (calibrated)

$ 87.48

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0.94ct Pink Morganite, Oval, VS

0.94ct Pink Morganite, Oval, VS

7.2 x 5.6 mm

$ 41.19

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4.37ctw Red Pyrope Garnet, Marquise, VVS-VS

4.37ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5 mm (calibrated)

$ 38.30

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1.19ct Purple Spinel, Pear Shape, VVS

1.19ct Purple Spinel, Pear Shape, VVS

7.6 x 5.5 mm

$ 197.54

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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

My whole experience is great.

Posted By Ghs in November, 2025
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Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
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Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
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Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

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

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate
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