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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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1.60ct Green Sphene, Oval, Transparent

1.60ct Green Sphene, Oval, Transparent

6.9 x 6.6 mm

$ 8.76

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1.28ctw Orange Citrine, Oval, VVS-VS

1.28ctw Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 12.75

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8.25ct Green Jadeite, Oval, Translucent

8.25ct Green Jadeite, Oval, Translucent

15.3 x 11.2 mm

$ 27.12

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5.42ct Brown Smoky Quartz, Round, VVS

5.42ct Brown Smoky Quartz, Round, VVS

12 mm (calibrated)

$ 17.82

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0.30ct Violet Iolite, Baguette, VS

0.30ct Violet Iolite, Baguette, VS

5 x 3 mm (calibrated)

$ 11.95

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1.03ct Brown Color-Change Garnet, Oval, VVS

1.03ct Brown Color-Change Garnet, Oval, VVS

6.4 x 5.3 mm

$ 82.29

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0.20ct Violet Iolite, Emerald Cut, VVS-VS

0.20ct Violet Iolite, Emerald Cut, VVS-VS

5 x 3 mm (calibrated)

$ 7.97

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4.05ct Pink Morganite, Oval, Transparent

4.05ct Pink Morganite, Oval, Transparent

11.7 x 8.9 mm

$ 16.81

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1.39ct White Sillimanite Cat'S Eye, Oval, Transparent

1.39ct White Sillimanite Cat'S Eye, Oval, Transparent

7.8 x 4.8 mm

$ 4.34

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0.52ct Orange Citrine, Marquise, VS

0.52ct Orange Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 3.63

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2.77ct Blue Chalcedony, Oval, Transparent

2.77ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 5.52

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11.76ctw Multicolor Jasper, Pear Shape, Opaque

11.76ctw Multicolor Jasper, Pear Shape, Opaque

17.5 x 12.2 mm

$ 6.67

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1.74ctw Violet Amethyst, Cushion, VVS-VS

1.74ctw Violet Amethyst, Cushion, VVS-VS

7.1 x 5.2 mm

$ 12.13

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102.80ct Multicolor Jasper, Oval, Opaque

102.80ct Multicolor Jasper, Oval, Opaque

50.2 x 37.3 mm

$ 51.19

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0.37ct Yellow Chrysoberyl Cat'S Eye, Round, Transparent

0.37ct Yellow Chrysoberyl Cat'S Eye, Round, Transparent

4 mm (calibrated)

$ 9.29

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1.55ctw Green Peridot, Oval, VVS-VS

1.55ctw Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 21.61

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7.35ct Orange Star Moonstone, Oval, Translucent

7.35ct Orange Star Moonstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 32.21

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22.46ct Blue Turquoise, Oval, Opaque

22.46ct Blue Turquoise, Oval, Opaque

25.2 x 16.6 mm

$ 67.11

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4.11ct Pink Kunzite, Emerald Cut, VVS

4.11ct Pink Kunzite, Emerald Cut, VVS

8 x 8 mm (calibrated)

$ 102.34

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0.12ct Violet Iolite, Square, VVS

0.12ct Violet Iolite, Square, VVS

3 x 3 mm (calibrated)

$ 4.78

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1.52ct Green Sphene, Oval, Transparent

1.52ct Green Sphene, Oval, Transparent

6.8 x 6.5 mm

$ 7.57

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3.91ct Violet Amethyst, Pear Shape, VVS-VS

3.91ct Violet Amethyst, Pear Shape, VVS-VS

14 x 9.7 mm

$ 28.39

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14.02ct Violet Charoite, Pear Shape, Opaque

14.02ct Violet Charoite, Pear Shape, Opaque

21.9 x 12.7 mm

$ 23.17

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17.37ctw Multicolor Jasper, Oval, Opaque

17.37ctw Multicolor Jasper, Oval, Opaque

24.4 x 10.5 mm

$ 24.35

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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

Enjoy every moment

Posted By Ferns in October, 2025
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Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
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Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
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Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
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Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

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

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate
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