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
1.44ctw Green Demantoid Garnet, Round, VVS-VS

1.44ctw Green Demantoid Garnet, Round, VVS-VS

4 mm (calibrated)

$ 157.77

View Gem
6.81ct Multicolor Cinnabar, Oval, Opaque

6.81ct Multicolor Cinnabar, Oval, Opaque

17.4 x 12.5 mm

$ 7.97

View Gem
2.47ct Red Strawberry Quartz, Round, Translucent

2.47ct Red Strawberry Quartz, Round, Translucent

9 mm (calibrated)

$ 37.89

View Gem
1.10ct Multicolor Labradorite, Round, Translucent

1.10ct Multicolor Labradorite, Round, Translucent

6 mm (calibrated)

$ 2.37

View Gem
2.57ctw Red Pyrope Garnet, Marquise, VVS-VS

2.57ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.2 mm

$ 22.53

View Gem
10.88ct Multicolor Pietersite, Oval, Opaque

10.88ct Multicolor Pietersite, Oval, Opaque

24.8 x 15 mm

$ 32.51

View Gem
8.01ct Multicolor Coral, Oval, Translucent

8.01ct Multicolor Coral, Oval, Translucent

20 x 15 mm (calibrated)

$ 25.01

View Gem
10.79ct Pink Rose Quartz, Oval, Transparent

10.79ct Pink Rose Quartz, Oval, Transparent

16 x 12 mm (calibrated)

$ 59.11

View Gem
10.04ct Multicolor Coral, Oval, Translucent

10.04ct Multicolor Coral, Oval, Translucent

18.7 x 14 mm

$ 31.34

View Gem
2.96ct Pink Rose Quartz, Flower Cut, Transparent

2.96ct Pink Rose Quartz, Flower Cut, Transparent

13.8 x 9.9 mm

$ 7.56

View Gem
1.44ct Orange Zircon, Emerald Cut, VVS-VS
Zircon Product Video (463450)

1.44ct Orange Zircon, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 23.66

View Gem
6.91ctw Pink Strawberry Quartz, Oval, Transparent

6.91ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 53.98

View Gem
12.75ctw Brown Smoky Quartz, Pear Shape, VVS

12.75ctw Brown Smoky Quartz, Pear Shape, VVS

14.9 x 11 mm

$ 41.92

View Gem
3.31ct Yellow Citrine, Emerald Cut, Transparent

3.31ct Yellow Citrine, Emerald Cut, Transparent

12 x 10 mm (calibrated)

$ 25.39

View Gem
6.05ct Orange Star Moonstone, Oval, Translucent

6.05ct Orange Star Moonstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 26.51

View Gem
26.51ct Bi-Color Ametrine, Oval, VS
Ametrine Product Video (590863)

26.51ct Bi-Color Ametrine, Oval, VS

22.3 x 17.6 mm

$ 145.23

View Gem
19.73ct Purple Ruby-Zoisite, Flower Cut, Opaque

19.73ct Purple Ruby-Zoisite, Flower Cut, Opaque

18.7 x 18.1 mm

$ 23.97

View Gem
1.00ct Yellow Beryl, Oval, VVS

1.00ct Yellow Beryl, Oval, VVS

8 x 6 mm (calibrated)

$ 19.92

View Gem
1.35ct Yellow Beryl, Round, VVS

1.35ct Yellow Beryl, Round, VVS

7 mm (calibrated)

$ 26.89

View Gem
1.14ctw Violet Amethyst, Emerald Cut, VS

1.14ctw Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 6.62

View Gem
96.40ct Violet Amethyst, Square, Opaque

96.40ct Violet Amethyst, Square, Opaque

27.4 x 27.2 mm

$ 80.01

View Gem
1.75ct White Opal, Oval, Transparent

1.75ct White Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 43.58

View Gem
31.08ct White Howlite, Oval, Opaque

31.08ct White Howlite, Oval, Opaque

31.7 x 22.1 mm

$ 15.48

View Gem
5.18ct Brown Smoky Quartz, Round, VVS-VS

5.18ct Brown Smoky Quartz, Round, VVS-VS

12 mm (calibrated)

$ 8.52

View Gem
1 2 3
...
1309
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

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 have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
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

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The website was very easy to use.

Posted By Garnet in January, 2026
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
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image