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
1.53ct Green Tourmaline, Emerald Cut, VVS

1.53ct Green Tourmaline, Emerald Cut, VVS

17.1 x 3.3 mm

$ 32.01

View Gem
7.95ct Multicolor Rainbow Pyrite, Baguette, Opaque

7.95ct Multicolor Rainbow Pyrite, Baguette, Opaque

14 x 10.4 mm

$ 20.51

View Gem
3.06ctw Green Prehnite, Oval, Transparent

3.06ctw Green Prehnite, Oval, Transparent

8.6 x 6.3 mm

$ 16.77

View Gem
4.07ct Multicolor Labradorite, Pear Shape, Translucent

4.07ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 9.01

View Gem
4.27ct Multicolor Tourmaline, Flower Cut, Transparent
Tourmaline Product Video (690466)

4.27ct Multicolor Tourmaline, Flower Cut, Transparent

14 x 11.1 mm

$ 83.22

View Gem
27.18ctw Multicolor Fossil Coral, Cushion, Opaque

27.18ctw Multicolor Fossil Coral, Cushion, Opaque

19.8 x 14.2 mm

$ 35.14

View Gem
0.89ct Orange Morganite, Oval, VVS-VS

0.89ct Orange Morganite, Oval, VVS-VS

7.7 x 5.7 mm

$ 39.89

View Gem
5.83ct Blue Chalcedony, Cushion, Translucent

5.83ct Blue Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 21.77

View Gem
24.18ct Multicolor Labradorite, Oval, Opaque

24.18ct Multicolor Labradorite, Oval, Opaque

25 x 18 mm (calibrated)

$ 21.67

View Gem
11.92ctw Green Seraphinite, Pear Shape, Opaque

11.92ctw Green Seraphinite, Pear Shape, Opaque

14 x 10 mm (calibrated)

$ 19.59

View Gem
2.20ct Orange Moonstone, Cushion, Translucent

2.20ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.38

View Gem
2.85ct Turquoise Grandidierite, Pear Shape, Translucent

2.85ct Turquoise Grandidierite, Pear Shape, Translucent

11.2 x 8.1 mm

$ 141.93

View Gem
4.60ct Multicolor Fire Agate, Oval, Opaque

4.60ct Multicolor Fire Agate, Oval, Opaque

12.9 x 10.3 mm

$ 35.37

View Gem
1.10ct Purple Spinel, Pear Shape, VVS

1.10ct Purple Spinel, Pear Shape, VVS

8 x 6 mm (calibrated)

$ 123.34

View Gem
4.39ctw Multicolor Spectrolite, Oval, Opaque

4.39ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 20.07

View Gem
22.14ct White Jadeite, Oval, Translucent

22.14ct White Jadeite, Oval, Translucent

19.8 x 16.9 mm

$ 26.44

View Gem
27.46ct Multicolor Jasper, Oval, Opaque

27.46ct Multicolor Jasper, Oval, Opaque

27 x 20 mm (calibrated)

$ 21.66

View Gem
2.47ctw Red Pyrope Garnet, Marquise, VVS-VS

2.47ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 21.65

View Gem
1.81ct Multicolor Opal, Oval, Translucent

1.81ct Multicolor Opal, Oval, Translucent

10.8 x 7.9 mm

$ 79.32

View Gem
36.50ct Pink Rose Quartz, Pear Shape, Transparent
Rose Quartz Product Video (528820)

36.50ct Pink Rose Quartz, Pear Shape, Transparent

25 x 20.9 mm

$ 79.98

View Gem
2.24ct Orange Hessonite Garnet, Round, VS

2.24ct Orange Hessonite Garnet, Round, VS

7.5 mm (calibrated)

$ 49.09

View Gem
0.83ctw Green Peridot, Oval, Transparent

0.83ctw Green Peridot, Oval, Transparent

6 x 4 mm (calibrated)

$ 14.88

View Gem
4.57ct Violet Amethyst, Heart, Transparent

4.57ct Violet Amethyst, Heart, Transparent

11.3 x 9.7 mm

$ 22.76

View Gem
0.93ctw Green Peridot, Marquise, VS

0.93ctw Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 13.89

View Gem
1 2 3
...
282
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

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 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

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image