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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

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For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Brown Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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1.48ct Blue Cavansite, Fancy, Opaque

1.48ct Blue Cavansite, Fancy, Opaque

8.5 x 7.6 mm

$ 8.60

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23.52ct Multicolor Pietersite, Baguette, Opaque
Pietersite Product Video (742897)

23.52ct Multicolor Pietersite, Baguette, Opaque

38.6 x 14.7 mm

$ 78.09

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1.33ct Pink Morganite, Round, VS

1.33ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 51.66

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1.54ct Yellow Beryl, Oval, VS

1.54ct Yellow Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 36.81

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1.19ct Orange Zircon, Round, VVS-VS

1.19ct Orange Zircon, Round, VVS-VS

6 mm (calibrated)

$ 26.08

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4.43ct Yellow Citrine, Oval, VVS-VS

4.43ct Yellow Citrine, Oval, VVS-VS

13.1 x 9.4 mm

$ 29.12

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43.57ct Multicolor Jasper, Oval, Opaque

43.57ct Multicolor Jasper, Oval, Opaque

32.5 x 24.6 mm

$ 47.74

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8.73ct Green Prehnite, Fancy, Translucent

8.73ct Green Prehnite, Fancy, Translucent

17.2 x 14.3 mm

$ 14.35

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1.47ct Green Tourmaline, Oval, VVS-VS

1.47ct Green Tourmaline, Oval, VVS-VS

6.5 x 5.9 mm

$ 170.81

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12.02ctw Blue Chalcedony, Oval, Translucent

12.02ctw Blue Chalcedony, Oval, Translucent

14 x 10 mm (calibrated)

$ 10.01

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1.27ct Multicolor Opal, Oval, Transparent

1.27ct Multicolor Opal, Oval, Transparent

11.1 x 7.6 mm

$ 31.94

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0.92ct Purple Spinel, Cushion, VS

0.92ct Purple Spinel, Cushion, VS

6 x 5.3 mm

$ 109.96

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1.21ct Green Peridot, Cushion, VVS-VS

1.21ct Green Peridot, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 19.89

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76.87ct Multicolor Coral, Oval, Opaque
Coral Product Video (491958)

76.87ct Multicolor Coral, Oval, Opaque

47.5 x 30 mm

$ 112.86

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5.74ctw White Rutile Quartz, Round, Transparent

5.74ctw White Rutile Quartz, Round, Transparent

9 mm (calibrated)

$ 12.58

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0.10ctw Black Diamond, Round, Opaque

0.10ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 79.68

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1.84ctw Yellow Golden Beryl, Oval, VVS-VS

1.84ctw Yellow Golden Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 50.40

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1.12ct Purple Rhodolite Garnet, Pear Shape, VS

1.12ct Purple Rhodolite Garnet, Pear Shape, VS

7 x 5 mm (calibrated)

$ 29.75

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0.93ctw Green Peridot, Pear Shape, VVS-VS

0.93ctw Green Peridot, Pear Shape, VVS-VS

6.1 x 4.2 mm

$ 8.15

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6.63ctw Black Spinel, Round, Opaque

6.63ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 29.05

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4.50ctw Red Pyrope Garnet, Square, VS

4.50ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 34.51

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4.11ct Multicolor Coral, Oval, Translucent

4.11ct Multicolor Coral, Oval, Translucent

14.9 x 11.3 mm

$ 13.50

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3.21ct Yellow Citrine, Oval, VVS

3.21ct Yellow Citrine, Oval, VVS

11.9 x 8.8 mm

$ 19.46

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1.24ct Brown Color-Change Garnet, Oval, VVS-VS

1.24ct Brown Color-Change Garnet, Oval, VVS-VS

6.5 x 5.6 mm

$ 99.06

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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

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

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