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

5.40ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 114.83

View Gem

1.33ct Multicolor Labradorite, Round, Translucent

6.5 mm (calibrated)

$ 3.24

View Gem

1.43ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 42.73

View Gem

4.72ct Multicolor Agate, Oval, Opaque

12.6 x 11.7 mm

$ 4.70

View Gem

1.35ct Violet Amethyst, Emerald Cut, Transparent

8 x 6 mm (calibrated)

$ 9.41

View Gem

1.17ct Brown Color-Change Garnet, Cushion, VVS

6.6 x 4.9 mm

$ 93.47

View Gem

3.04ct Yellow Citrine, Oval, VVS-VS

12 x 8 mm (calibrated)

$ 23.31

View Gem

2.13ct Bi-Color Ametrine, Emerald Cut, VVS

9 x 7 mm (calibrated)

$ 22.34

View Gem

2.27ct Orange Hessonite Garnet, Oval, VS-SI

8.5 x 7.1 mm

$ 41.43

View Gem

11.12ct Black Nuummite, Oval, Opaque

17.4 x 11.7 mm

$ 45.63

View Gem

2.68ct Orange Hessonite Garnet, Cushion, VS

9 x 7 mm (calibrated)

$ 48.05

View Gem

1.59ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 12.19

View Gem

1.60ctw Yellow Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 12.75

View Gem

2.79ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 45.86

View Gem

3.17ctw Green Tourmaline, Round, Transparent

7 mm (calibrated)

$ 52.54

View Gem

2.25ct Multicolor Labradorite, Baguette, Transparent

8 x 6 mm (calibrated)

$ 4.93

View Gem

3.78ctw White Rainbow Moonstone, Pear Shape, Transparent

4.9 x 4.8 mm

$ 69.02

View Gem

1.26ctw Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 31.37

View Gem

1.77ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 13.58

View Gem

1.81ct Orange Hessonite Garnet, Oval, VS

8.2 x 6.8 mm

$ 53.92

View Gem

7.43ct Multicolor Boulder Opal, Oval, Opaque

23.9 x 8 mm

$ 51.80

View Gem

0.43ct Pink Morganite, Oval, VS

5.9 x 4.5 mm

$ 19.27

View Gem

2.66ctw Green Peridot, Square, VS

5 x 5 mm (calibrated)

$ 29.14

View Gem

0.83ct Orange Zircon, Oval, VS

5.9 x 5 mm

$ 12.40

View Gem
1 2 3
...
1757
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

Great! Affordable

Posted By Spinellope in April, 2026
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 -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

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