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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
Blue Untreated Gemstones
Brown Untreated Gemstones
Golden Untreated Gemstones
Gray Untreated Gemstones
Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Red Untreated Gemstones
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Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
Single
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34.60ct Multicolor Rhodochrosite, Oval, Translucent

34.60ct Multicolor Rhodochrosite, Oval, Translucent

32.1 x 17.7 mm

$ 30.33

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0.90ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458684)

0.90ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 162.21

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7.86ct Yellow Cat'S Eye Opal, Oval, Translucent

7.86ct Yellow Cat'S Eye Opal, Oval, Translucent

15 x 10 mm (calibrated)

$ 14.13

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1.48ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.48ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.7 x 5.3 mm

$ 4.86

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9.93ct Brown Smoky Quartz, Round, VVS-VS
Smoky Quartz Product Video (602189)

9.93ct Brown Smoky Quartz, Round, VVS-VS

15 mm (calibrated)

$ 40.03

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0.89ct Yellow Morganite, Cushion, VS

0.89ct Yellow Morganite, Cushion, VS

6 x 6 mm (calibrated)

$ 48.75

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3.64ct Yellow Prehnite, Oval, Transparent/Translucent

3.64ct Yellow Prehnite, Oval, Transparent/Translucent

10 x 8 mm (calibrated)

$ 28.45

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89.42ct Pink Rose Quartz, Oval, Transparent
Rose Quartz Product Video (521011)

89.42ct Pink Rose Quartz, Oval, Transparent

31.8 x 26.8 mm

$ 195.93

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11.21ct Pink Morganite, Oval, Translucent

11.21ct Pink Morganite, Oval, Translucent

17.5 x 12.1 mm

$ 122.82

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37.98ct Multicolor Opal, Pear Shape, Opaque
Opal Product Video (667934)

37.98ct Multicolor Opal, Pear Shape, Opaque

30 x 22 mm (calibrated)

$ 94.57

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10.16ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

10.16ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

22.3 x 15.9 mm

$ 35.71

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0.25ct Yellow Diamond, Round, VS-SI
Diamond Product Video (564633)

0.25ct Yellow Diamond, Round, VS-SI

4 mm (calibrated)

$ 380.34

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29.23ctw Multicolor Fossil Coral, Fancy, Opaque
Fossil Coral Product Video (514331)

29.23ctw Multicolor Fossil Coral, Fancy, Opaque

21.7 x 14.7 mm

$ 63.41

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7.14ctw Pink Strawberry Quartz, Round, Translucent

7.14ctw Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 109.52

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30.31ct Green Maw-Sit-Sit, Baguette, Opaque

30.31ct Green Maw-Sit-Sit, Baguette, Opaque

17 x 14.9 mm

$ 99.62

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14.28ct Multicolor Quartz With Marcasite, Trillion, Transparent

14.28ct Multicolor Quartz With Marcasite, Trillion, Transparent

19.1 x 22.4 mm

$ 78.23

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15.37ct Blue Aquamarine, Emerald Cut, VVS
Aquamarine Product Video (450370)

15.37ct Blue Aquamarine, Emerald Cut, VVS

23.7 x 9.2 mm

$ 2,551.42

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17.33ct Turquoise Grandidierite, Pear Shape, SI
Grandidierite Product Video (470657)

17.33ct Turquoise Grandidierite, Pear Shape, SI

17.6 x 16.4 mm

$ 7,911.15

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1.47ct Yellow Chrysoberyl, Pear Shape, VVS
Chrysoberyl Product Video (366656)

1.47ct Yellow Chrysoberyl, Pear Shape, VVS

8.4 x 6.3 mm

$ 155.73

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1.99ctw White Sillimanite Cat'S Eye, Oval, Transparent

1.99ctw White Sillimanite Cat'S Eye, Oval, Transparent

7.5 x 5.6 mm

$ 6.54

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33.90ct Turquoise Chrysocolla, Oval, Opaque

33.90ct Turquoise Chrysocolla, Oval, Opaque

33.1 x 19.2 mm

$ 57.73

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57.02ct Multicolor Amethyst Geode Slice, Fancy, Transparent
Amethyst Geode Slice Product Video (684869)

57.02ct Multicolor Amethyst Geode Slice, Fancy, Transparent

34.5 x 27.6 mm

$ 60.76

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7.85ct Yellow Rutile Quartz, Oval, Transparent

7.85ct Yellow Rutile Quartz, Oval, Transparent

15 x 10.8 mm

$ 21.50

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1.18ct Red Rhodolite Garnet, Oval, VVS-VS
Rhodolite Garnet Product Video (503909)

1.18ct Red Rhodolite Garnet, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 27.33

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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 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 -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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