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
10.57ct Multicolor Labradorite, Pear Shape, Transparent

10.57ct Multicolor Labradorite, Pear Shape, Transparent

16 x 12 mm (calibrated)

$ 23.37

View Gem
4.51ct Brown Pietersite, Trillion, Opaque

4.51ct Brown Pietersite, Trillion, Opaque

14.4 x 12.7 mm

$ 14.82

View Gem
0.90ct Green Peridot, Emerald Cut, VS-SI

0.90ct Green Peridot, Emerald Cut, VS-SI

7 x 5 mm (calibrated)

$ 14.34

View Gem
2.93ct Yellow Citrine, Oval, VVS-VS

2.93ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 22.47

View Gem
1.79ctw Orange Spessartite Garnet, Round, VS

1.79ctw Orange Spessartite Garnet, Round, VS

4.5 mm (calibrated)

$ 60.80

View Gem
25.44ct White Scolecite, Cushion, Opaque

25.44ct White Scolecite, Cushion, Opaque

27 x 20 mm (calibrated)

$ 27.87

View Gem
3.26ct Multicolor Pietersite, Trillion, Opaque

3.26ct Multicolor Pietersite, Trillion, Opaque

14.5 x 13.1 mm

$ 7.70

View Gem
12.25ct Multicolor Agate, Round, Opaque

12.25ct Multicolor Agate, Round, Opaque

13 mm (calibrated)

$ 8.13

View Gem
1.45ctw Yellow Citrine, Heart, VVS-VS

1.45ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 11.55

View Gem
6.02ct Pink Morganite, Oval, Transparent

6.02ct Pink Morganite, Oval, Transparent

13 x 11 mm (calibrated)

$ 59.96

View Gem
1.24ct Yellow Sillimanite, Oval, VS

1.24ct Yellow Sillimanite, Oval, VS

8 x 6 mm (calibrated)

$ 47.55

View Gem
11.79ct White Rainbow Moonstone, Baguette, Transparent

11.79ct White Rainbow Moonstone, Baguette, Transparent

20.6 x 10.8 mm

$ 176.14

View Gem
3.62ctw White Topaz, Square, VVS-VS

3.62ctw White Topaz, Square, VVS-VS

4 x 4 mm (calibrated)

$ 29.15

View Gem
21.31ct Blue Turquoise, Oval, Opaque

21.31ct Blue Turquoise, Oval, Opaque

22.1 x 13.5 mm

$ 63.68

View Gem
4.92ct Orange Spessartite Garnet, Oval, Transparent

4.92ct Orange Spessartite Garnet, Oval, Transparent

9.5 x 8 mm

$ 122.51

View Gem
1.40ct Green Tourmaline, Emerald Cut, VVS-VS

1.40ct Green Tourmaline, Emerald Cut, VVS-VS

18.6 x 3.1 mm

$ 30.76

View Gem
1.54ct Green Tourmaline, Emerald Cut, VVS

1.54ct Green Tourmaline, Emerald Cut, VVS

19.6 x 3.4 mm

$ 42.18

View Gem
0.39ct Yellow Citrine, Heart, VVS

0.39ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.10

View Gem
28.46ct Violet Amethyst, Oval, IF

28.46ct Violet Amethyst, Oval, IF

21.4 x 17.2 mm

$ 218.27

View Gem
1.84ct Pink Strawberry Quartz, Round, Translucent

1.84ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.11

View Gem
1.29ctw Red Pyrope Garnet, Square, VVS-VS

1.29ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 9.89

View Gem
2.57ct Green Chrysoprase, Oval, Translucent

2.57ct Green Chrysoprase, Oval, Translucent

10 x 8 mm (calibrated)

$ 21.33

View Gem
0.37ct Orange Spessartite Garnet, Oval, VS-SI

0.37ct Orange Spessartite Garnet, Oval, VS-SI

4.4 x 3.5 mm

$ 12.90

View Gem
14.97ct Green Prehnite, Fancy, Transparent

14.97ct Green Prehnite, Fancy, Transparent

18.9 x 12.2 mm

$ 25.91

View Gem
1 2 3
...
997
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

My whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic 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 of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

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