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

1.95ctw White Topaz, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 13.60

View Gem

1.26ct Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 8.37

View Gem

3.16ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 23.67

View Gem

0.97ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6 x 5.5 mm

$ 35.91

View Gem

8.15ct Green Druzy Variscite, Fancy, Opaque

20.3 x 13.8 mm

$ 8.36

View Gem

1.93ctw Green Demantoid Garnet, Oval, VS-SI

5 x 4 mm (calibrated)

$ 211.45

View Gem

1.56ct Yellow Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 31.08

View Gem

0.68ct Green Tourmaline, Round, Transparent

5 mm (calibrated)

$ 12.41

View Gem

7.34ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 40.21

View Gem

1.06ct Yellow Color-Change Diaspore, Cushion, VVS-VS

7.3 x 5.2 mm

$ 55.47

View Gem

6.04ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 9.02

View Gem

66.39ct Red Star Garnet, Oval, Opaque

23.5 x 19.6 mm

$ 65.47

View Gem

10.74ctw Yellow Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 29.29

View Gem

9.37ct Multicolor Boulder Opal, Pear Shape, Opaque

24.7 x 11.8 mm

$ 38.89

View Gem

2.96ctw Green Tsavorite Garnet, Square, VVS-VS

2.5 x 2.4 mm

$ 275.65

View Gem

1.31ct Pink Tourmaline, Round, Transparent

7 mm (calibrated)

$ 22.46

View Gem

2.37ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 11.80

View Gem

1.81ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.62

View Gem

8.24ct Multicolor Agate, Oval, Opaque

13 x 11.6 mm

$ 8.21

View Gem

14.78ct Multicolor Labradorite, Round, Translucent

16 mm (calibrated)

$ 17.67

View Gem

1.90ct Orange Citrine, Round, VS

8 mm (calibrated)

$ 15.77

View Gem

2.72ct Green Malachite, Oval, Opaque

8.4 x 6.2 mm

$ 2.71

View Gem

28.56ct Violet Amethyst, Pear Shape, IF

22.9 x 16.6 mm

$ 219.03

View Gem

0.51ct Yellow Citrine, Cushion, VVS

5 x 5 mm (calibrated)

$ 3.81

View Gem
1 2 3
...
310
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

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate
Enlarged Gemstone Image