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
1.80ct Violet Amethyst, Square, VVS

1.80ct Violet Amethyst, Square, VVS

7.6 x 7.5 mm

$ 14.34

View Gem
0.14ct White Diamond, Round, VVS
Diamond Product Video (747201)

0.14ct White Diamond, Round, VVS

3.4 mm

$ 235.06

View Gem
0.79ctw Multicolor Labradorite, Pear Shape, Translucent

0.79ctw Multicolor Labradorite, Pear Shape, Translucent

6 x 4 mm (calibrated)

$ 1.45

View Gem
0.88ct Green Sphene, Oval, Transparent

0.88ct Green Sphene, Oval, Transparent

5.6 x 5.3 mm

$ 4.38

View Gem
1.17ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.17ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.7 x 5.7 mm

$ 3.69

View Gem
3.33ctw Multicolor Andalusite, Round, VS

3.33ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 122.00

View Gem
3.24ct Yellow Rutile Topaz, Cushion, Transparent

3.24ct Yellow Rutile Topaz, Cushion, Transparent

10.8 x 7.1 mm

$ 67.23

View Gem
3.13ct Multicolor Labradorite, Baguette, Translucent

3.13ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 4.30

View Gem
18.46ct Violet Amethyst, Cushion, VVS

18.46ct Violet Amethyst, Cushion, VVS

20 x 15 mm (calibrated)

$ 128.70

View Gem
1.08ct Orange Sunstone, Oval, Translucent

1.08ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 7.53

View Gem
1.97ct Orange Hessonite Garnet, Oval, VS-SI

1.97ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 38.85

View Gem
3.32ct Violet Amethyst, Briolette, VS

3.32ct Violet Amethyst, Briolette, VS

9.7 x 7.5 mm

$ 14.55

View Gem
1.46ct White Sillimanite Cat'S Eye, Oval, Transparent

1.46ct White Sillimanite Cat'S Eye, Oval, Transparent

7.7 x 4.4 mm

$ 4.57

View Gem
9.79ctw Brown Zircon, Oval, Transparent

9.79ctw Brown Zircon, Oval, Transparent

6.1 x 4.3 mm

$ 62.57

View Gem
1.28ct Green Tourmaline, Emerald Cut, VS

1.28ct Green Tourmaline, Emerald Cut, VS

5.9 x 5.3 mm

$ 63.74

View Gem
7.02ct Pink Morganite, Oval, Translucent

7.02ct Pink Morganite, Oval, Translucent

10 x 11.1 mm

$ 76.91

View Gem
13.10ct Yellow Rutile Quartz, Pear Shape, Transparent

13.10ct Yellow Rutile Quartz, Pear Shape, Transparent

25.5 x 10.8 mm

$ 35.89

View Gem
0.45ct Yellow Citrine, Marquise, VS

0.45ct Yellow Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 3.36

View Gem
1.50ct Purple Spinel, Cushion, VVS-VS

1.50ct Purple Spinel, Cushion, VVS-VS

6.7 x 6 mm

$ 106.82

View Gem
2.92ctw Red Pyrope Garnet, Square, VVS-VS

2.92ctw Red Pyrope Garnet, Square, VVS-VS

6 x 6 mm (calibrated)

$ 22.39

View Gem
1.73ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (461710)

1.73ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 189.54

View Gem
22.16ct Brown Jasper, Fancy, Opaque

22.16ct Brown Jasper, Fancy, Opaque

40.3 x 12.3 mm

$ 33.98

View Gem
9.00ct Pink Strawberry Quartz, Oval, Translucent

9.00ct Pink Strawberry Quartz, Oval, Translucent

16 x 12 mm (calibrated)

$ 66.95

View Gem
0.76ct Pink Morganite, Pear Shape, VS

0.76ct Pink Morganite, Pear Shape, VS

7.7 x 5.7 mm

$ 33.31

View Gem
1 2 3
...
597
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

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 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 -> 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