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
0.26ct Pink Morganite, Round, VVS-VS

0.26ct Pink Morganite, Round, VVS-VS

4.3 mm

$ 10.79

View Gem
41.06ct Multicolor Jasper, Oval, Opaque

41.06ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 24.29

View Gem
0.93ct Orange Sphalerite, Oval, SI-I1

0.93ct Orange Sphalerite, Oval, SI-I1

5.7 x 4.9 mm

$ 46.31

View Gem
1.87ct Orange Hessonite Garnet, Round, VS

1.87ct Orange Hessonite Garnet, Round, VS

7 mm (calibrated)

$ 40.98

View Gem
1.13ct Orange Zircon, Oval, VS

1.13ct Orange Zircon, Oval, VS

6.2 x 5 mm

$ 16.88

View Gem
24.97ctw Multicolor Coral, Cushion, Opaque

24.97ctw Multicolor Coral, Cushion, Opaque

20.7 x 13.6 mm

$ 47.33

View Gem
19.39ct Pink Rose Quartz, Oval, Transparent/Translucent

19.39ct Pink Rose Quartz, Oval, Transparent/Translucent

18.9 x 13.3 mm

$ 28.68

View Gem
0.84ctw Yellow Citrine, Oval, VS

0.84ctw Yellow Citrine, Oval, VS

6 x 4 mm (calibrated)

$ 4.60

View Gem
3.11ctw Green Prehnite, Oval, Transparent

3.11ctw Green Prehnite, Oval, Transparent

8.1 x 6.9 mm

$ 17.04

View Gem
1.54ct Orange Hessonite Garnet, Cushion, VS-SI

1.54ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 5 mm (calibrated)

$ 27.61

View Gem
24.71ct Multicolor Boulder Opal, Oval, Opaque

24.71ct Multicolor Boulder Opal, Oval, Opaque

42.2 x 16.8 mm

$ 123.06

View Gem
3.73ct Orange Sunstone, Round, Translucent

3.73ct Orange Sunstone, Round, Translucent

10 mm (calibrated)

$ 21.73

View Gem
1.15ct Green Tourmaline, Emerald Cut, VS

1.15ct Green Tourmaline, Emerald Cut, VS

15.8 x 3 mm

$ 31.51

View Gem
1.08ct Brown Sillimanite Cat'S Eye, Oval, Transparent

1.08ct Brown Sillimanite Cat'S Eye, Oval, Transparent

7 x 4.8 mm

$ 3.23

View Gem
4.81ctw Pink Strawberry Quartz, Oval, Transparent

4.81ctw Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 35.74

View Gem
7.15ct Pink Strawberry Quartz, Oval, Translucent

7.15ct Pink Strawberry Quartz, Oval, Translucent

12.5 x 10.5 mm

$ 43.09

View Gem
0.70ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

0.70ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

9 x 3.9 mm

$ 24.54

View Gem
2.47ct Yellow Apatite, Emerald Cut, VS

2.47ct Yellow Apatite, Emerald Cut, VS

8 x 8 mm (calibrated)

$ 127.19

View Gem
1.87ct Violet Amethyst, Heart, VVS

1.87ct Violet Amethyst, Heart, VVS

8 x 8 mm (calibrated)

$ 13.04

View Gem
11.48ct Brown Tiger'S Eye, Baguette, Opaque

11.48ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 11.44

View Gem
15.94ct Green Fluorite, Oval, Transparent

15.94ct Green Fluorite, Oval, Transparent

16.6 x 13.3 mm

$ 17.46

View Gem
22.64ctw Multicolor Fossil Coral, Pear Shape, Opaque

22.64ctw Multicolor Fossil Coral, Pear Shape, Opaque

22.4 x 12.7 mm

$ 24.80

View Gem
0.65ct Orange Zircon, Oval, VVS

0.65ct Orange Zircon, Oval, VVS

5.2 x 4.1 mm

$ 9.71

View Gem
3.15ctw Red Pyrope Garnet, Marquise, VVS-VS

3.15ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6 mm

$ 31.16

View Gem
1 2 3
...
290
Choose Page
1 - 1897

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

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

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