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
1.29ct Green Tourmaline, Emerald Cut, VVS-VS

1.29ct Green Tourmaline, Emerald Cut, VVS-VS

13.8 x 3.4 mm

$ 64.24

View Gem
1.90ct Pink Strawberry Quartz, Round, Translucent

1.90ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.57

View Gem
3.12ctw Yellow Sillimanite, Oval, VVS-VS
Sillimanite Product Video (411815)

3.12ctw Yellow Sillimanite, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 119.64

View Gem
1.25ctw Violet Amethyst, Marquise, VS

1.25ctw Violet Amethyst, Marquise, VS

8.1 x 4.2 mm

$ 8.30

View Gem
26.25ctw Multicolor Jasper, Pear Shape, Opaque

26.25ctw Multicolor Jasper, Pear Shape, Opaque

28.5 x 15.6 mm

$ 34.51

View Gem
1.44ct Multicolor Opal, Oval, Translucent

1.44ct Multicolor Opal, Oval, Translucent

10 x 8 mm (calibrated)

$ 66.27

View Gem
15.15ct White Rainbow Moonstone, Round, Transparent
Rainbow Moonstone Product Video (669079)

15.15ct White Rainbow Moonstone, Round, Transparent

17 mm (calibrated)

$ 271.61

View Gem
16.74ct Multicolor Jasper, Pear Shape, Opaque

16.74ct Multicolor Jasper, Pear Shape, Opaque

22.5 x 17.8 mm

$ 10.45

View Gem
5.18ct Yellow Rutile Quartz, Round, Transparent

5.18ct Yellow Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 14.13

View Gem
24.85ct Red Strawberry Quartz, Oval, Translucent
Strawberry Quartz Product Video (472295)

24.85ct Red Strawberry Quartz, Oval, Translucent

20.6 x 16.9 mm

$ 190.58

View Gem
38.90ct Multicolor Tiger'S Eye Matrix, Cushion, Opaque

38.90ct Multicolor Tiger'S Eye Matrix, Cushion, Opaque

29.1 x 24.8 mm

$ 17.44

View Gem
1.26ct Orange Sunstone, Oval, Translucent

1.26ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 7.32

View Gem
1.09ct Red Rhodolite Garnet, Oval, VS

1.09ct Red Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 28.95

View Gem
6.92ctw Brown Smoky Quartz, Round, VVS-VS

6.92ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 37.91

View Gem
16.28ct Pink Rose Quartz, Oval, Translucent

16.28ct Pink Rose Quartz, Oval, Translucent

18 x 15.1 mm

$ 16.35

View Gem
1.57ct Yellow Citrine, Emerald Cut, VVS-VS

1.57ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 10.32

View Gem
1.13ctw Green Peridot, Marquise, VS

1.13ctw Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 16.88

View Gem
0.63ct Yellow Citrine, Pear Shape, VVS

0.63ct Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 3.14

View Gem
7.84ct Multicolor Labradorite, Round, Translucent

7.84ct Multicolor Labradorite, Round, Translucent

13 mm (calibrated)

$ 9.37

View Gem
0.82ct Purple Spinel, Oval, VVS-VS

0.82ct Purple Spinel, Oval, VVS-VS

6.7 x 4.8 mm

$ 44.02

View Gem
0.94ct Violet Amethyst, Marquise, VVS-VS

0.94ct Violet Amethyst, Marquise, VVS-VS

10 x 5 mm (calibrated)

$ 6.24

View Gem
1.85ct Black Star Diopside, Oval, Opaque

1.85ct Black Star Diopside, Oval, Opaque

8 x 6 mm (calibrated)

$ 9.21

View Gem
1.58ctw Yellow Citrine, Heart, VVS

1.58ctw Yellow Citrine, Heart, VVS

6 x 6 mm (calibrated)

$ 12.59

View Gem
1.19ctw Green Demantoid Garnet, Oval, VS

1.19ctw Green Demantoid Garnet, Oval, VS

4.2 x 3.5 mm

$ 130.38

View Gem
1 2 3
...
577
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

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 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

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image