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
38.76ct Multicolor Jasper, Cushion, Opaque

38.76ct Multicolor Jasper, Cushion, Opaque

30 x 24.5 mm

$ 21.23

View Gem
38.34ct Gray Hematite, Round, Opaque

38.34ct Gray Hematite, Round, Opaque

21.6 mm

$ 25.20

View Gem
7.23ct Green Chrysoprase, Oval, Opaque
Chrysoprase Product Video (750226)

7.23ct Green Chrysoprase, Oval, Opaque

12.7 x 11.6 mm

$ 90.01

View Gem
22.94ct Multicolor Pietersite, Oval, Opaque

22.94ct Multicolor Pietersite, Oval, Opaque

30.1 x 19.2 mm

$ 53.69

View Gem
5.38ct White Topaz, Oval, VVS-VS
Topaz Product Video (384958)

5.38ct White Topaz, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 41.27

View Gem
0.42ct Multicolor Chocolate Opal, Oval, Translucent

0.42ct Multicolor Chocolate Opal, Oval, Translucent

7 x 5 mm (calibrated)

$ 12.55

View Gem
3.90ct Multicolor Opal, Oval, Transparent

3.90ct Multicolor Opal, Oval, Transparent

12 x 10 mm (calibrated)

$ 98.05

View Gem
7.08ct Multicolor Fire Agate, Fancy, Opaque

7.08ct Multicolor Fire Agate, Fancy, Opaque

17.2 x 9.1 mm

$ 59.96

View Gem
14.04ct Green Serpentine, Oval, Translucent

14.04ct Green Serpentine, Oval, Translucent

19 x 14.4 mm

$ 30.07

View Gem
15.02ct Gray Jadeite, Oval, Translucent

15.02ct Gray Jadeite, Oval, Translucent

20.8 x 13.6 mm

$ 32.91

View Gem
0.30ct Orange Spessartite Garnet, Oval, VS-SI

0.30ct Orange Spessartite Garnet, Oval, VS-SI

5 x 3 mm (calibrated)

$ 10.46

View Gem
3.67ctw Red Pyrope Garnet, Marquise, VVS-VS

3.67ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6.1 mm

$ 32.17

View Gem
1.96ct Orange Pyrope Garnet, Fancy, Translucent

1.96ct Orange Pyrope Garnet, Fancy, Translucent

11.9 x 8.4 mm

$ 4.92

View Gem
5.44ct Yellow Citrine, Oval, VVS-VS

5.44ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 32.66

View Gem
2.86ct Yellow Golden Beryl, Round, VVS

2.86ct Yellow Golden Beryl, Round, VVS

10 mm (calibrated)

$ 71.56

View Gem
9.40ct Brown Smoky Quartz, Emerald Cut, VVS

9.40ct Brown Smoky Quartz, Emerald Cut, VVS

13 x 13 mm (calibrated)

$ 18.43

View Gem
2.74ct Violet Amethyst, Trillion, VVS-VS

2.74ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 16.38

View Gem
1.06ct Blue Kyanite, Oval, SI

1.06ct Blue Kyanite, Oval, SI

7.1 x 5.3 mm

$ 26.39

View Gem
1.42ct Yellow Citrine, Emerald Cut, VVS

1.42ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 9.90

View Gem
14.45ct Multicolor Boulder Opal, Oval, Opaque

14.45ct Multicolor Boulder Opal, Oval, Opaque

20 x 15 mm (calibrated)

$ 71.96

View Gem
12.99ct Yellow Rutile Quartz, Pear Shape, Transparent

12.99ct Yellow Rutile Quartz, Pear Shape, Transparent

19.2 x 14.3 mm

$ 35.30

View Gem
3.19ctw Yellow Citrine, Emerald Cut, VVS-VS

3.19ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 25.41

View Gem
1.14ct Yellow Citrine, Cushion, VVS

1.14ct Yellow Citrine, Cushion, VVS

8 x 6 mm (calibrated)

$ 8.52

View Gem
3.34ctw Orange Hessonite Garnet, Cushion, VS-SI

3.34ctw Orange Hessonite Garnet, Cushion, VS-SI

6 x 6 mm (calibrated)

$ 52.26

View Gem
1 2 3
...
1125
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

It was easy to navigate

Posted By GemGod in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

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