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
11.18ctw Multicolor Labradorite, Round, Translucent

11.18ctw Multicolor Labradorite, Round, Translucent

12 mm (calibrated)

$ 24.05

View Gem
0.05ct Black Diamond, Round, Opaque

0.05ct Black Diamond, Round, Opaque

2.2 mm (calibrated)

$ 16.28

View Gem
6.84ct Multicolor Labradorite, Pear Shape, Translucent

6.84ct Multicolor Labradorite, Pear Shape, Translucent

14 x 10 mm (calibrated)

$ 15.12

View Gem
8.73ctw Multicolor Pietersite, Baguette, Opaque

8.73ctw Multicolor Pietersite, Baguette, Opaque

15.4 x 8.7 mm

$ 21.40

View Gem
1.19ct Pink Strawberry Quartz, Oval, Translucent

1.19ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 15.04

View Gem
3.08ctw Red Rhodolite Garnet, Square, VS

3.08ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 26.96

View Gem
0.63ct Green Peridot, Marquise, VS

0.63ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 5.02

View Gem
17.47ct Multicolor Jasper, Fancy, Opaque

17.47ct Multicolor Jasper, Fancy, Opaque

19.4 x 17.9 mm

$ 9.57

View Gem
3.09ct Turquoise Grandidierite, Oval, Translucent

3.09ct Turquoise Grandidierite, Oval, Translucent

9.8 x 8.8 mm

$ 169.27

View Gem
8.98ct Gray Jadeite, Oval, Translucent

8.98ct Gray Jadeite, Oval, Translucent

18.6 x 13.7 mm

$ 29.51

View Gem
14.99ctw Black Spinel, Round, Opaque

14.99ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 49.27

View Gem
10.01ct Multicolor Agate, Oval, Opaque

10.01ct Multicolor Agate, Oval, Opaque

14.1 x 12.7 mm

$ 16.95

View Gem
7.19ct Green Prehnite, Fancy, Transparent

7.19ct Green Prehnite, Fancy, Transparent

17.5 x 10.5 mm

$ 10.24

View Gem
2.20ctw Red Pyrope Garnet, Oval, VVS-VS

2.20ctw Red Pyrope Garnet, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 15.89

View Gem
2.15ctw Purple Rhodolite Garnet, Oval, VS

2.15ctw Purple Rhodolite Garnet, Oval, VS

5.5 x 3.5 mm

$ 34.98

View Gem
9.57ct Multicolor Labradorite, Round, Translucent

9.57ct Multicolor Labradorite, Round, Translucent

14 mm (calibrated)

$ 20.58

View Gem
1.09ct Blue Kyanite, Round, SI

1.09ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 27.14

View Gem
62.07ct White Howlite, Oval, Opaque

62.07ct White Howlite, Oval, Opaque

36.6 x 26.6 mm

$ 34.01

View Gem
4.33ct White Topaz, Round, VVS-VS

4.33ct White Topaz, Round, VVS-VS

10 mm (calibrated)

$ 20.16

View Gem
0.97ct Brown Color-Change Garnet, Oval, VS

0.97ct Brown Color-Change Garnet, Oval, VS

6.5 x 4.9 mm

$ 77.49

View Gem
1.02ctw Violet Amethyst, Marquise, VVS-VS

1.02ctw Violet Amethyst, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 6.77

View Gem
1.59ct Orange Hessonite Garnet, Oval, VS

1.59ct Orange Hessonite Garnet, Oval, VS

8 x 6 mm (calibrated)

$ 31.67

View Gem
0.95ct Green Tourmaline, Baguette, VVS-VS

0.95ct Green Tourmaline, Baguette, VVS-VS

11.4 x 3.2 mm

$ 33.12

View Gem
0.62ct Green Cat'S Eye Alexandrite, Oval, Opaque

0.62ct Green Cat'S Eye Alexandrite, Oval, Opaque

5.6 x 4.5 mm

$ 128.65

View Gem
1 2 3
...
687
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 -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image