90,000+Happy Customers
20+Years
WorldwideShipping
Cart
Free Report Included
Worldwide Shipping
30 Day Returns
Help Center Shipping Payment and Checkout Returns Certificates Contact Us
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

Choose Size or Size Range
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
Purple Untreated Gemstones
Red Untreated Gemstones
Turquoise Untreated Gemstones
Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
Single
Pairs
Lots
Faceted
Cabochons
Clear All

0.77ct White Sillimanite Cat'S Eye, Oval, Transparent

7.5 x 4.3 mm

$ 2.40

View Gem

19.20ctw Green Amazonite, Round, Opaque

10 mm (calibrated)

$ 15.30

View Gem

1.64ct Turquoise Grandidierite, Oval, Translucent

9 x 6 mm (calibrated)

$ 453.58

View Gem

27.82ct Green Jadeite, Oval, Opaque

23.3 x 18.5 mm

$ 45.72

View Gem

2.07ct Green Tourmaline, Emerald Cut, VS

24.6 x 3.3 mm

$ 51.54

View Gem

3.92ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 30.06

View Gem

0.58ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 15.89

View Gem

26.45ct Black Nuummite, Emerald Cut, Opaque

18.9 x 16.9 mm

$ 116.18

View Gem

1.31ctw Orange Citrine, Oval, VS

7 x 5 mm (calibrated)

$ 13.05

View Gem

8.28ct Green Chrysoprase, Baguette, Opaque

14.5 x 10.7 mm

$ 103.09

View Gem

1.24ct Yellow Color-Change Diaspore, Cushion, VS

6.3 x 6.1 mm

$ 65.45

View Gem

18.72ct Violet Amethyst, Emerald Cut, VVS-VS

18.3 x 14.1 mm

$ 130.52

View Gem

11.77ct Multicolor Agate, Oval, Opaque

15.5 x 12.6 mm

$ 11.72

View Gem

7.33ct Blue Aquamarine, Oval, Translucent

16.9 x 10.7 mm

$ 152.10

View Gem

0.95ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.62

View Gem

6.62ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 26.19

View Gem

3.79ctw White Topaz, Square, SI

3.5 x 3.5 mm

$ 29.07

View Gem

15.21ct Green Serpentine, Oval, Translucent

25 x 18 mm (calibrated)

$ 32.57

View Gem

70.80ct Violet Amethyst, Pear Shape, VVS

30.5 x 29.9 mm

$ 564.13

View Gem

16.21ctw Multicolor Fossil Coral, Pear Shape, Opaque

19.2 x 11.1 mm

$ 35.17

View Gem

10.68ct Pink Kunzite, Emerald Cut, VVS

14.5 x 9.4 mm

$ 281.88

View Gem

26.95ct Violet Amethyst, Emerald Cut, VVS

20 x 16 mm

$ 154.61

View Gem

0.86ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 7.71

View Gem

2.34ct Violet Sapphire, Oval, VS-SI

9.5 x 7.8 mm

$ 936.00

View Gem
1 2 3
...
861
Choose Page
1 - 1896

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 -> 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 -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I've been looking for.

Posted By Tree Dog in April, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate
Enlarged Gemstone Image