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

42.78ct Brown Tiger'S Eye, Cushion, Opaque

30 x 22 mm (calibrated)

$ 19.69

View Gem

0.69ct Pink Morganite, Pear Shape, VS

7.1 x 5.4 mm

$ 30.93

View Gem

0.76ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 5.30

View Gem

25.92ct Multicolor Rainbow Pyrite, Fancy, Opaque

34.4 x 16.9 mm

$ 67.12

View Gem

12.11ctw Green Amazonite, Cushion, Opaque

10 x 10 mm (calibrated)

$ 26.78

View Gem

1.38ct Orange Hessonite Garnet, Oval, VS-SI

7.3 x 6.1 mm

$ 27.49

View Gem

0.25ct Yellow Diamond, Round, VS

4 mm (calibrated)

$ 456.41

View Gem

1.31ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 28.70

View Gem

4.38ct Pink Morganite, Pear Shape, Transparent

13.5 x 9.7 mm

$ 47.99

View Gem

3.43ctw Multicolor Andalusite, Round, VS

3.7 mm

$ 125.68

View Gem

0.50ct White Rainbow Moonstone, Baguette, Transparent

6 x 4 mm (calibrated)

$ 17.43

View Gem

2.31ct Red Almandine Garnet, Pear Shape, VS

10.3 x 7.4 mm

$ 86.28

View Gem

0.85ct Yellow Beryl, Oval, VVS

8 x 6 mm (calibrated)

$ 16.93

View Gem

1.02ct Violet Amethyst, Marquise, VVS

10 x 5 mm (calibrated)

$ 6.77

View Gem

2.17ct Green Prehnite, Oval, Transparent/Translucent

7.9 x 7.2 mm

$ 16.64

View Gem

0.44ct Orange Spessartite Garnet, Oval, VS

5 x 3.3 mm

$ 13.59

View Gem

3.35ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 26.68

View Gem

8.99ct Black Tourmaline, Oval, Opaque

14 x 12 mm (calibrated)

$ 44.77

View Gem

37.03ct Green Opal, Pear Shape, Opaque

27.9 x 22.1 mm

$ 79.29

View Gem

1.72ctw Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 23.99

View Gem

1.21ct Yellow Beryl, Trillion, VVS

8 x 8 mm (calibrated)

$ 24.10

View Gem

3.32ctw Green Tsavorite Garnet, Marquise, VS

5.3 x 2.7 mm

$ 145.50

View Gem

5.94ct Red Almandine Garnet, Emerald Cut, VS-SI

12.6 x 7.7 mm

$ 177.49

View Gem

2.58ctw Purple Rhodolite Garnet, Round, VS

5 mm (calibrated)

$ 56.53

View Gem
1 2 3
...
694
Choose Page
1 - 1897

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

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was easy to navigate

Posted By GemGod in July, 2025
Source: Bizrate
Enlarged Gemstone Image