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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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2.91ctw Green Prehnite, Oval, Transparent

2.91ctw Green Prehnite, Oval, Transparent

7.5 x 6.2 mm

$ 15.94

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0.45ct Yellow Citrine, Heart, VS

0.45ct Yellow Citrine, Heart, VS

6 x 5.1 mm

$ 2.87

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3.37ct Yellow Citrine, Emerald Cut, VVS

3.37ct Yellow Citrine, Emerald Cut, VVS

12 x 8 mm (calibrated)

$ 23.50

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2.55ctw Orange Sunstone, Oval, Translucent

2.55ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 15.59

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2.87ctw White Rainbow Moonstone, Square, Transparent/Translucent

2.87ctw White Rainbow Moonstone, Square, Transparent/Translucent

3 x 3 mm (calibrated)

$ 68.13

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7.40ctw Multicolor Labradorite, Round, Opaque

7.40ctw Multicolor Labradorite, Round, Opaque

10 mm (calibrated)

$ 17.99

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1.02ctw Orange Citrine, Trillion, VVS-VS

1.02ctw Orange Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 8.47

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0.47ct Yellow Spessartite Garnet, Oval, VS

0.47ct Yellow Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 14.04

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22.93ct Multicolor Pietersite, Oval, Opaque

22.93ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 75.36

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4.29ct Orange Sunstone, Oval, Translucent

4.29ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 25.51

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1.50ctw Yellow Citrine, Trillion, VVS-VS

1.50ctw Yellow Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 10.46

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3.04ctw Orange Zircon, Emerald Cut, VS

3.04ctw Orange Zircon, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 49.96

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5.06ctw Yellow Citrine, Heart, VS

5.06ctw Yellow Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 33.27

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12.75ct Multicolor Agate, Oval, Opaque

12.75ct Multicolor Agate, Oval, Opaque

20.9 x 12.4 mm

$ 10.16

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8.46ct Multicolor Fire Agate, Fancy, Opaque

8.46ct Multicolor Fire Agate, Fancy, Opaque

14.5 x 11.1 mm

$ 65.05

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1.25ct Green Peridot, Oval, VS

1.25ct Green Peridot, Oval, VS

7.6 x 5.8 mm

$ 11.21

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5.98ct Yellow Rutile Quartz, Round, Translucent

5.98ct Yellow Rutile Quartz, Round, Translucent

13 mm (calibrated)

$ 16.24

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42.78ct Brown Tiger'S Eye, Cushion, Opaque

42.78ct Brown Tiger'S Eye, Cushion, Opaque

30 x 22 mm (calibrated)

$ 19.69

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5.32ct Brown Smoky Quartz, Round, VVS

5.32ct Brown Smoky Quartz, Round, VVS

12 mm (calibrated)

$ 29.14

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1.22ct Green Tourmaline, Oval, Transparent

1.22ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 20.92

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13.15ctw Green Aventurine, Oval, Translucent

13.15ctw Green Aventurine, Oval, Translucent

16 x 10.9 mm

$ 28.82

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0.79ct Green Peridot, Oval, VS

0.79ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 4.59

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3.55ct White Topaz, Heart, VVS-VS

3.55ct White Topaz, Heart, VVS-VS

9.8 x 9.6 mm

$ 29.47

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19.30ct Bi-Color Ametrine, Pear Shape, VVS-VS

19.30ct Bi-Color Ametrine, Pear Shape, VVS-VS

20.3 x 18.6 mm

$ 148.01

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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 -> 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 -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman 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

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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