X
Gemstone Search
90,000+ Happy Customers
20+ Years In Business
Call Us Mon–Fri 8am–5pm

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

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
12.72ct Multicolor Pietersite, Oval, Opaque

12.72ct Multicolor Pietersite, Oval, Opaque

25.6 x 16.9 mm

$ 38.01

View Gem
1.71ct Orange Hessonite Garnet, Oval, VS-SI

1.71ct Orange Hessonite Garnet, Oval, VS-SI

8 x 6.7 mm

$ 28.10

View Gem
8.94ct Turquoise Hemimorphite Druzy, Fancy, Opaque
Hemimorphite Druzy Product Video (439517)

8.94ct Turquoise Hemimorphite Druzy, Fancy, Opaque

16.7 x 10.5 mm

$ 146.92

View Gem
0.87ct Blue Kyanite, Oval, SI

0.87ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 21.66

View Gem
7.46ct Brown Moonstone, Oval, Translucent

7.46ct Brown Moonstone, Oval, Translucent

14 x 12 mm (calibrated)

$ 16.43

View Gem
13.04ct Brown Tiger'S Eye, Pear Shape, Opaque

13.04ct Brown Tiger'S Eye, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 12.99

View Gem
0.40ct Yellow Sphalerite, Oval, SI-I1

0.40ct Yellow Sphalerite, Oval, SI-I1

4.7 x 3.9 mm

$ 19.92

View Gem
3.14ct Yellow Citrine, Oval, VS

3.14ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 17.20

View Gem
2.33ctw Pink Strawberry Quartz, Oval, Translucent
Strawberry Quartz Product Video (546949)

2.33ctw Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 30.64

View Gem
2.26ct Blue Chalcedony, Oval, Transparent

2.26ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 4.50

View Gem
0.98ct Blue Kyanite, Oval, SI

0.98ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 24.40

View Gem
2.62ct Orange Pyrope Garnet, Fancy, Translucent

2.62ct Orange Pyrope Garnet, Fancy, Translucent

12.5 x 8.2 mm

$ 6.57

View Gem
1.93ct Yellow Beryl, Oval, VS

1.93ct Yellow Beryl, Oval, VS

9.7 x 7.7 mm

$ 36.84

View Gem
6.90ct Red Almandine Garnet, Oval, VVS-VS

6.90ct Red Almandine Garnet, Oval, VVS-VS

12.6 x 9.5 mm

$ 206.17

View Gem
5.58ct Green Prehnite, Fancy, Translucent

5.58ct Green Prehnite, Fancy, Translucent

13.8 x 10.1 mm

$ 9.17

View Gem
1.72ct Green Tourmaline, Emerald Cut, VVS-VS

1.72ct Green Tourmaline, Emerald Cut, VVS-VS

19.7 x 3.1 mm

$ 56.53

View Gem
1.12ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

1.12ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

6.7 x 5.2 mm

$ 16.65

View Gem
4.90ctw Multicolor Tourmaline, Briolette, VS-SI

4.90ctw Multicolor Tourmaline, Briolette, VS-SI

6.3 x 3.6 mm

$ 85.90

View Gem
1.56ct Yellow Sphene, Oval, Transparent

1.56ct Yellow Sphene, Oval, Transparent

6.6 x 6.1 mm

$ 7.77

View Gem
8.47ct Black Tourmaline, Oval, Opaque

8.47ct Black Tourmaline, Oval, Opaque

14.2 x 11.2 mm

$ 42.18

View Gem
2.28ctw Orange Sunstone, Oval, Translucent

2.28ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 13.94

View Gem
1.47ct Orange Moonstone, Marquise, Translucent

1.47ct Orange Moonstone, Marquise, Translucent

10 x 5 mm (calibrated)

$ 2.93

View Gem
1.15ct Red Rhodolite Garnet, Oval, VS

1.15ct Red Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 30.54

View Gem
2.03ctw Orange Zircon, Oval, VVS

2.03ctw Orange Zircon, Oval, VVS

6.1 x 4.8 mm

$ 50.55

View Gem
1 2 3
...
1593
Choose Page
1 - 1895

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

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 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 -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 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
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image