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

2.60ct Green Malachite, Oval, Opaque

8.9 x 6.3 mm

$ 1.99

View Gem

1.55ct Multicolor Opal, Pear Shape, Translucent

10 x 8 mm (calibrated)

$ 35.67

View Gem

1.43ct Orange Hessonite Garnet, Oval, VVS-VS

7.5 x 6.2 mm

$ 21.85

View Gem

4.18ct Pink Strawberry Quartz, Oval, Translucent

11 x 9 mm (calibrated)

$ 32.06

View Gem

1.90ct Multicolor Opal, Pear Shape, Transparent

13 x 9 mm (calibrated)

$ 83.27

View Gem

2.23ct Green Sphene, Oval, Transparent

8.1 x 7 mm

$ 12.22

View Gem

1.59ct Orange Sphalerite, Trillion, SI

7 x 7 mm (calibrated)

$ 95.02

View Gem

5.55ctw Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 38.69

View Gem

5.49ct Pink Strawberry Quartz, Oval, Translucent

14 x 10 mm (calibrated)

$ 33.08

View Gem

2.12ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 79.18

View Gem

4.62ct Multicolor Dendritic Agate, Pear Shape, Transparent

17.1 x 13.8 mm

$ 16.41

View Gem

7.98ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 4.69

View Gem

2.98ct Purple Kunzite, Emerald Cut, VVS-VS

9.6 x 7.2 mm

$ 74.20

View Gem

3.87ct Pink Morganite, Trillion, Transparent

11.2 x 10.3 mm

$ 16.06

View Gem

18.90ctw Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 24.44

View Gem

36.09ct Multicolor Boulder Opal, Oval, Opaque

29.8 x 18.5 mm

$ 276.78

View Gem

3.43ctw Orange Citrine, Round, VS

8 mm (calibrated)

$ 28.47

View Gem

0.98ctw Green Peridot, Oval, Transparent

6 x 4 mm (calibrated)

$ 17.57

View Gem

11.30ct Brown Tiger'S Eye, Fancy, Opaque

16 x 14.9 mm

$ 13.25

View Gem

12.84ct Violet Amethyst, Round, VVS

16 mm (calibrated)

$ 89.52

View Gem

1.28ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 8.42

View Gem

4.57ct Multicolor Agate, Oval, Opaque

11 x 9 mm (calibrated)

$ 7.74

View Gem

8.27ct Multicolor Quartz With Marcasite, Oval, Transparent

14.6 x 12.6 mm

$ 54.37

View Gem

13.80ct Green Hiddenite, Pear Shape, VS-SI

16.9 x 12 mm

$ 342.52

View Gem
1 2 3
...
926
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 -> 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

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
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
Enlarged Gemstone Image