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
33.07ct Green Jadeite, Fancy, Translucent

33.07ct Green Jadeite, Fancy, Translucent

42.5 x 14.2 mm

$ 27.17

View Gem
2.33ct Blue Chalcedony, Oval, Transparent

2.33ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 4.64

View Gem
8.80ct White Quartz Cat'S Eye, Round, Transparent

8.80ct White Quartz Cat'S Eye, Round, Transparent

13 mm (calibrated)

$ 38.56

View Gem
1.00ct Orange Zircon, Oval, VVS-VS

1.00ct Orange Zircon, Oval, VVS-VS

6.1 x 5 mm

$ 14.94

View Gem
0.97ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

0.97ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7.3 x 5.3 mm

$ 18.36

View Gem
3.93ct Multicolor Opal, Oval, Translucent

3.93ct Multicolor Opal, Oval, Translucent

17.3 x 10.8 mm

$ 97.86

View Gem
3.08ct White Topaz, Round, VS

3.08ct White Topaz, Round, VS

9 mm (calibrated)

$ 23.62

View Gem
5.56ct Multicolor Agate, Oval, Opaque

5.56ct Multicolor Agate, Oval, Opaque

10.7 x 10.5 mm

$ 4.43

View Gem
4.36ctw Red Pyrope Garnet, Marquise, VVS-VS

4.36ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6.1 mm

$ 38.21

View Gem
0.72ct Multicolor Opal, Marquise, Transparent

0.72ct Multicolor Opal, Marquise, Transparent

9.8 x 5 mm

$ 23.01

View Gem
5.12ct Yellow Citrine, Oval, VVS

5.12ct Yellow Citrine, Oval, VVS

13.5 x 10 mm

$ 39.26

View Gem
2.95ct Red Tourmaline, Oval, Transparent

2.95ct Red Tourmaline, Oval, Transparent

10 x 8 mm (calibrated)

$ 50.56

View Gem
1.15ct Green Tourmaline, Emerald Cut, VS

1.15ct Green Tourmaline, Emerald Cut, VS

9.5 x 4 mm

$ 57.27

View Gem
0.27ct Yellow Sphalerite, Round, SI

0.27ct Yellow Sphalerite, Round, SI

3.8 mm

$ 13.45

View Gem
4.49ct Yellow Citrine, Emerald Cut, VVS-VS

4.49ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 31.31

View Gem
95.86ct Multicolor Moss Agate, Pear Shape, Opaque

95.86ct Multicolor Moss Agate, Pear Shape, Opaque

69.4 x 40.2 mm

$ 76.38

View Gem
0.31ct Pink Morganite, Round, VS

0.31ct Pink Morganite, Round, VS

5 mm (calibrated)

$ 12.87

View Gem
7.82ctw Multicolor Labradorite, Marquise, Translucent

7.82ctw Multicolor Labradorite, Marquise, Translucent

14 x 7 mm (calibrated)

$ 17.29

View Gem
25.49ct White Dendritic Agate, Round, Translucent

25.49ct White Dendritic Agate, Round, Translucent

23.1 mm

$ 50.78

View Gem
3.52ct Multicolor Agate, Oval, Translucent

3.52ct Multicolor Agate, Oval, Translucent

8.4 x 8.2 mm

$ 7.01

View Gem
23.25ct Green Aventurine, Fancy, Opaque

23.25ct Green Aventurine, Fancy, Opaque

37.8 x 9.1 mm

$ 1.93

View Gem
5.64ct Blue Chalcedony, Flower Cut, Translucent

5.64ct Blue Chalcedony, Flower Cut, Translucent

13 x 13 mm (calibrated)

$ 6.18

View Gem
2.33ct Yellow Citrine, Oval, VVS

2.33ct Yellow Citrine, Oval, VVS

14 x 7 mm

$ 16.24

View Gem
1.63ct Pink Morganite, Round, VVS-VS

1.63ct Pink Morganite, Round, VVS-VS

8 mm (calibrated)

$ 125.01

View Gem
1 2 3
...
1320
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

Enjoy every moment

Posted By Ferns 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

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

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