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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
Turquoise Untreated Gemstones
Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
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83.26ct Multicolor Moss Agate, Oval, Opaque
Moss Agate Product Video (695452)

83.26ct Multicolor Moss Agate, Oval, Opaque

60.1 x 30.4 mm

$ 66.34

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56.33ct Multicolor Rhodochrosite, Pear Shape, Translucent
Rhodochrosite Product Video (548707)

56.33ct Multicolor Rhodochrosite, Pear Shape, Translucent

37.5 x 23.3 mm

$ 74.06

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9.30ct Green Prehnite, Oval, Translucent

9.30ct Green Prehnite, Oval, Translucent

16 x 12 mm (calibrated)

$ 47.89

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0.81ct Green Sphene, Oval, VS-SI

0.81ct Green Sphene, Oval, VS-SI

6.6 x 4.9 mm

$ 48.81

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9.97ct Brown Smoky Quartz, Emerald Cut, VVS-VS

9.97ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 54.62

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29.42ct Multicolor Jasper, Oval, Opaque

29.42ct Multicolor Jasper, Oval, Opaque

34.2 x 22.4 mm

$ 48.35

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89.56ct Yellow Quartz, Oval, VVS
Quartz Product Video (470296)

89.56ct Yellow Quartz, Oval, VVS

36 x 22.7 mm

$ 122.66

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0.86ct Orange Sphalerite, Trillion, SI-I1

0.86ct Orange Sphalerite, Trillion, SI-I1

5.8 x 5.6 mm

$ 42.83

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7.50ct Multicolor Fire Agate, Fancy, Translucent
Fire Agate Product Video (623668)

7.50ct Multicolor Fire Agate, Fancy, Translucent

13.8 x 11.1 mm

$ 105.68

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2.17ct Brown Tiger'S Eye, Marquise, Opaque

2.17ct Brown Tiger'S Eye, Marquise, Opaque

12 x 6 mm (calibrated)

$ 2.12

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5.81ct Brown Cat'S Eye Scapolite, Oval, Translucent

5.81ct Brown Cat'S Eye Scapolite, Oval, Translucent

11.5 x 9.3 mm

$ 31.83

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8.87ctw Black Cat'S Eye Scapolite, Oval, Translucent
Cat's Eye Scapolite Product Video (484137)

8.87ctw Black Cat'S Eye Scapolite, Oval, Translucent

9.1 x 8.6 mm

$ 48.60

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2.06ctw White Sillimanite Cat'S Eye, Oval, Transparent

2.06ctw White Sillimanite Cat'S Eye, Oval, Transparent

7.3 x 5 mm

$ 6.49

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4.96ct Pink Kunzite, Emerald Cut, VS
Kunzite Product Video (693346)

4.96ct Pink Kunzite, Emerald Cut, VS

10.7 x 6.7 mm

$ 113.74

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1.71ct Pink Malaya Garnet, Marquise, VS-SI

1.71ct Pink Malaya Garnet, Marquise, VS-SI

10.8 x 5.4 mm

$ 59.61

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6.65ct Yellow Color-Change Diaspore, Cushion, VS-SI
Color-Change Diaspore Product Video (381560)

6.65ct Yellow Color-Change Diaspore, Cushion, VS-SI

12 x 10 mm (calibrated)

$ 3,131.71

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2.29ct Orange Hessonite Garnet, Cushion, VS-SI

2.29ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 42.94

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0.89ctw Multicolor Opal, Oval, Transparent

0.89ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 203.14

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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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64.36ctw Multicolor Labradorite, Round, Translucent
Labradorite Product Video (712049)

64.36ctw Multicolor Labradorite, Round, Translucent

25.4 mm

$ 118.59

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6.39ct Green Amazonite, Marquise, Opaque

6.39ct Green Amazonite, Marquise, Opaque

17.8 x 9.1 mm

$ 15.33

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26.39ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (350679)

26.39ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 115.65

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29.21ct Blue Chalcedony, Cushion, Opaque

29.21ct Blue Chalcedony, Cushion, Opaque

33.6 x 18.4 mm

$ 60.61

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64.31ct Multicolor Jasper, Pear Shape, Opaque

64.31ct Multicolor Jasper, Pear Shape, Opaque

30.6 x 32.1 mm

$ 54.25

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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

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

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

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

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
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate
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