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
0.85ct Orange Zircon, Oval, VVS

0.85ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 12.70

View Gem
0.39ct Orange Clinohumite, Oval, SI

0.39ct Orange Clinohumite, Oval, SI

6 x 4 mm (calibrated)

$ 19.42

View Gem
30.38ct Black Obsidian, Cushion, Opaque

30.38ct Black Obsidian, Cushion, Opaque

24.4 x 19.5 mm

$ 27.74

View Gem
18.44ct Pink Rose Quartz, Oval, Transparent

18.44ct Pink Rose Quartz, Oval, Transparent

18.1 x 14.6 mm

$ 40.40

View Gem
1.43ct Yellow Citrine, Oval, Transparent

1.43ct Yellow Citrine, Oval, Transparent

8 x 6 mm (calibrated)

$ 9.40

View Gem
1.04ct Yellow Tourmaline, Round, Transparent

1.04ct Yellow Tourmaline, Round, Transparent

6 mm (calibrated)

$ 15.87

View Gem
1.61ct Red Almandine Garnet, Baguette, VVS

1.61ct Red Almandine Garnet, Baguette, VVS

9.8 x 5 mm

$ 60.13

View Gem
3.05ctw Violet Amethyst, Oval, VS

3.05ctw Violet Amethyst, Oval, VS

7 x 5 mm (calibrated)

$ 16.72

View Gem
2.63ct Multicolor Labradorite, Pear Shape, Translucent

2.63ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 5.82

View Gem
8.02ct Yellow Citrine, Emerald Cut, VVS

8.02ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 50.53

View Gem
11.70ct Green Maw-Sit-Sit, Oval, Opaque

11.70ct Green Maw-Sit-Sit, Oval, Opaque

16 x 12 mm (calibrated)

$ 34.96

View Gem
5.20ct Brown Moonstone, Oval, Translucent

5.20ct Brown Moonstone, Oval, Translucent

11 x 9 mm (calibrated)

$ 11.45

View Gem
22.94ct Multicolor Jasper, Oval, Opaque

22.94ct Multicolor Jasper, Oval, Opaque

26.2 x 16.9 mm

$ 14.09

View Gem
18.24ct Blue Larimar, Pear Shape, Opaque
Larimar Product Video (447380)

18.24ct Blue Larimar, Pear Shape, Opaque

29.1 x 17.6 mm

$ 218.01

View Gem
4.18ct Red Rhodolite Garnet, Oval, VS

4.18ct Red Rhodolite Garnet, Oval, VS

10.1 x 8.5 mm

$ 173.47

View Gem
1.36ct Green Tourmaline, Emerald Cut, VS

1.36ct Green Tourmaline, Emerald Cut, VS

16.4 x 3.6 mm

$ 35.76

View Gem
0.86ct Brown Sillimanite Cat'S Eye, Oval, Transparent

0.86ct Brown Sillimanite Cat'S Eye, Oval, Transparent

5.3 x 4.9 mm

$ 2.57

View Gem
9.41ct Yellow Rutile Quartz, Round, Translucent

9.41ct Yellow Rutile Quartz, Round, Translucent

15 mm (calibrated)

$ 25.56

View Gem
1.99ct Black Star Diopside, Oval, Transparent

1.99ct Black Star Diopside, Oval, Transparent

8 x 6 mm (calibrated)

$ 9.91

View Gem
2.55ct Violet Amethyst, Trillion, VS

2.55ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 19.11

View Gem
1.55ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.55ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 28.88

View Gem
5.50ct Yellow Apatite, Oval, VS

5.50ct Yellow Apatite, Oval, VS

12 x 10 mm (calibrated)

$ 180.77

View Gem
13.35ctw Green Prehnite, Fancy, Transparent

13.35ctw Green Prehnite, Fancy, Transparent

18.2 x 11.6 mm

$ 20.92

View Gem
11.56ct Multicolor Quartz With Marcasite, Oval, Transparent

11.56ct Multicolor Quartz With Marcasite, Oval, Transparent

18.5 x 12.3 mm

$ 75.99

View Gem
1 2 3
...
1402
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

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate

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 -> 9 star ratings

Easy to use. Many options to find the right gemstone

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