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
1.26ct Orange Clinohumite, Oval, SI-I1
Clinohumite Product Video (735096)

1.26ct Orange Clinohumite, Oval, SI-I1

8 x 6 mm (calibrated)

$ 62.75

View Gem
3.27ctw Green Prehnite, Oval, Transparent

3.27ctw Green Prehnite, Oval, Transparent

8.2 x 6.8 mm

$ 17.92

View Gem
24.93ctw Multicolor Fossil Coral, Fancy, Opaque

24.93ctw Multicolor Fossil Coral, Fancy, Opaque

18.6 x 12.1 mm

$ 27.31

View Gem
2.30ct Multicolor Tourmaline, Emerald Cut, VVS
Tourmaline Product Video (744052)

2.30ct Multicolor Tourmaline, Emerald Cut, VVS

10.7 x 5.5 mm

$ 515.43

View Gem
9.46ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (395815)

9.46ct Yellow Apatite, Emerald Cut, VS

11 x 11 mm (calibrated)

$ 384.74

View Gem
5.41ct Pink Rose Quartz, Emerald Cut, Transparent

5.41ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 29.64

View Gem
1.55ct Yellow Citrine, Trillion, VS

1.55ct Yellow Citrine, Trillion, VS

8 x 8 mm (calibrated)

$ 11.89

View Gem
2.14ct Orange Hessonite Garnet, Oval, VS

2.14ct Orange Hessonite Garnet, Oval, VS

8.6 x 7 mm

$ 30.48

View Gem
2.85ct Turquoise Grandidierite, Pear Shape, Translucent

2.85ct Turquoise Grandidierite, Pear Shape, Translucent

11.2 x 8.1 mm

$ 141.93

View Gem
3.17ctw Red Pyrope Garnet, Heart, VVS-VS

3.17ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 24.31

View Gem
1.05ct Violet Amethyst, Square, VVS-VS

1.05ct Violet Amethyst, Square, VVS-VS

6 x 6 mm (calibrated)

$ 8.37

View Gem
1.00ctw Green Peridot, Marquise, VVS-VS

1.00ctw Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 7.97

View Gem
1.65ct Orange Zircon, Emerald Cut, VVS
Zircon Product Video (430499)

1.65ct Orange Zircon, Emerald Cut, VVS

7 x 5 mm (calibrated)

$ 45.20

View Gem
3.47ctw Green Tsavorite Garnet, Pear Shape, VS
Tsavorite Garnet Product Video (482555)

3.47ctw Green Tsavorite Garnet, Pear Shape, VS

5 x 3 mm (calibrated)

$ 190.09

View Gem
1.41ctw Yellow Citrine, Pear Shape, VVS
Citrine Product Video (688979)

1.41ctw Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 11.24

View Gem
1.69ct Yellow Citrine, Round, VVS

1.69ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 11.79

View Gem
8.27ct Multicolor Ruby-Zoisite, Baguette, Opaque

8.27ct Multicolor Ruby-Zoisite, Baguette, Opaque

11 x 9 mm (calibrated)

$ 22.65

View Gem
0.73ct Pink Morganite, Pear Shape, VS

0.73ct Pink Morganite, Pear Shape, VS

8 x 5.2 mm

$ 63.98

View Gem
3.82ctw White Topaz, Square, VS-SI

3.82ctw White Topaz, Square, VS-SI

3.6 x 3.6 mm

$ 29.29

View Gem
1.00ct Pink Morganite, Oval, VS

1.00ct Pink Morganite, Oval, VS

7.6 x 6 mm

$ 43.82

View Gem
36.80ct Multicolor Jasper, Fancy, Opaque

36.80ct Multicolor Jasper, Fancy, Opaque

39.1 x 11.2 mm

$ 11.00

View Gem
5.61ct Green Prehnite, Fancy, Translucent

5.61ct Green Prehnite, Fancy, Translucent

15 x 10 mm (calibrated)

$ 9.22

View Gem
2.61ct Red Tourmaline, Oval, Transparent

2.61ct Red Tourmaline, Oval, Transparent

9.1 x 6.3 mm

$ 44.74

View Gem
0.90ct Purple Spinel, Cushion, VS

0.90ct Purple Spinel, Cushion, VS

6.3 x 5.7 mm

$ 67.23

View Gem
1 2 3
...
89
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

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

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 -> 10 star ratings

A pleasant experience and many choices to choose from

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