90,000+Happy Customers
20+Years
WorldwideShipping
Cart
Free Report Included
Worldwide Shipping
30 Day Returns
Help Center Shipping Payment and Checkout Returns Certificates Contact Us
Home › Gemstones › Untreated Gemstones

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
18.63ctw Green Prehnite, Fancy, Transparent

18.63ctw Green Prehnite, Fancy, Transparent

15 x 10 mm (calibrated)

$ 25.93

View Gem
44.98ct Violet Amethyst, Oval, VVS
Amethyst Product Video (506016)

44.98ct Violet Amethyst, Oval, VVS

24.5 x 20.5 mm

$ 295.68

View Gem
7.68ct Multicolor Agate, Round, Opaque

7.68ct Multicolor Agate, Round, Opaque

12 mm (calibrated)

$ 7.27

View Gem
2.02ct Orange Hessonite Garnet, Cushion, SI

2.02ct Orange Hessonite Garnet, Cushion, SI

7 x 7 mm (calibrated)

$ 34.41

View Gem
2.40ct White Rainbow Moonstone, Cushion, VVS

2.40ct White Rainbow Moonstone, Cushion, VVS

9 x 7 mm (calibrated)

$ 250.55

View Gem
16.85ct Pink Rose Quartz, Oval, Transparent/Translucent

16.85ct Pink Rose Quartz, Oval, Transparent/Translucent

16.3 x 14.7 mm

$ 24.00

View Gem
41.53ct Green Amazonite, Oval, Opaque

41.53ct Green Amazonite, Oval, Opaque

31.7 x 25.7 mm

$ 33.08

View Gem
5.14ctw Orange Moonstone, Cushion, Translucent

5.14ctw Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 10.24

View Gem
2.37ct Red Almandine Garnet, Oval, VVS-VS

2.37ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 88.52

View Gem
7.44ct Yellow Citrine, Oval, VVS

7.44ct Yellow Citrine, Oval, VVS

15.1 x 11.2 mm

$ 57.06

View Gem
1.54ct Brown Tiger'S Eye, Round, Opaque

1.54ct Brown Tiger'S Eye, Round, Opaque

8 mm (calibrated)

$ 1.54

View Gem
0.88ct Multicolor Chocolate Opal, Oval, Translucent

0.88ct Multicolor Chocolate Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 28.93

View Gem
3.65ct Yellow Citrine, Oval, VS

3.65ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 24.00

View Gem
13.06ct Violet Amethyst, Round, VVS

13.06ct Violet Amethyst, Round, VVS

16 mm (calibrated)

$ 91.05

View Gem
79.99ct Brown Tiger'S Eye, Oval, Opaque

79.99ct Brown Tiger'S Eye, Oval, Opaque

40.9 x 28.1 mm

$ 36.81

View Gem
1.30ct Pink Morganite, Pear Shape, VS

1.30ct Pink Morganite, Pear Shape, VS

9.9 x 5.9 mm

$ 99.70

View Gem
28.23ctw Black Spinel, Baguette, Opaque

28.23ctw Black Spinel, Baguette, Opaque

20.2 x 10.2 mm

$ 84.35

View Gem
4.05ct Yellow Citrine, Oval, VS

4.05ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 32.27

View Gem
0.67ct Pink Morganite, Pear Shape, VS

0.67ct Pink Morganite, Pear Shape, VS

5.7 x 6 mm

$ 40.38

View Gem
3.68ctw Yellow Citrine, Round, VS

3.68ctw Yellow Citrine, Round, VS

8 mm (calibrated)

$ 29.32

View Gem
15.52ct Green Maw-Sit-Sit, Round, Opaque

15.52ct Green Maw-Sit-Sit, Round, Opaque

14 mm (calibrated)

$ 51.01

View Gem
23.59ct Bi-Color Ametrine, Pear Shape, VS
Ametrine Product Video (606043)

23.59ct Bi-Color Ametrine, Pear Shape, VS

21.8 x 19 mm

$ 180.92

View Gem
0.86ct Brown Smoky Quartz, Baguette, VVS

0.86ct Brown Smoky Quartz, Baguette, VVS

6.5 x 5.5 mm

$ 5.99

View Gem
7.86ct Blue Chalcedony, Cushion, Translucent

7.86ct Blue Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 29.37

View Gem
1 2 3
...
430
Choose Page
1 - 1896

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

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
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

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

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