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
10.49ct Violet Amethyst, Round, VVS-VS

10.49ct Violet Amethyst, Round, VVS-VS

15 mm (calibrated)

$ 73.14

View Gem
11.15ct Multicolor Labradorite, Pear Shape, Translucent

11.15ct Multicolor Labradorite, Pear Shape, Translucent

22.4 x 16.1 mm

$ 24.44

View Gem
6.40ct Red Almandine Garnet, Emerald Cut, VVS-VS

6.40ct Red Almandine Garnet, Emerald Cut, VVS-VS

13.2 x 8.2 mm

$ 191.23

View Gem
3.01ctw Brown Smoky Quartz, Round, VS

3.01ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 13.19

View Gem
2.76ctw Red Pyrope Garnet, Square, VS

2.76ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 21.17

View Gem
1.97ctw Red Spessartite Garnet, Round, VS

1.97ctw Red Spessartite Garnet, Round, VS

4.2 mm

$ 66.91

View Gem
3.68ctw Brown Smoky Quartz, Round, VS

3.68ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 16.13

View Gem
3.24ct Orange Sunstone, Round, Transparent

3.24ct Orange Sunstone, Round, Transparent

10 mm (calibrated)

$ 18.88

View Gem
1.15ctw Yellow Zircon, Oval, VVS

1.15ctw Yellow Zircon, Oval, VVS

5.2 x 4.1 mm

$ 28.64

View Gem
6.33ct Yellow Tourmaline, Oval, VS-SI
Tourmaline Product Video (704359)

6.33ct Yellow Tourmaline, Oval, VS-SI

12 x 10 mm (calibrated)

$ 690.68

View Gem
2.72ct Yellow Citrine, Square, VVS-VS

2.72ct Yellow Citrine, Square, VVS-VS

8 x 8 mm (calibrated)

$ 15.90

View Gem
8.58ct Multicolor Boulder Opal, Cushion, Opaque

8.58ct Multicolor Boulder Opal, Cushion, Opaque

15 x 10.9 mm

$ 59.82

View Gem
9.25ct Multicolor Cinnabar, Cushion, Opaque

9.25ct Multicolor Cinnabar, Cushion, Opaque

16 x 16 mm (calibrated)

$ 10.82

View Gem
2.21ctw Red Pyrope Garnet, Marquise, VVS-VS

2.21ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5.1 mm

$ 19.37

View Gem
5.06ct White Dendritic Agate, Pear Shape, Opaque

5.06ct White Dendritic Agate, Pear Shape, Opaque

14 x 10 mm (calibrated)

$ 4.03

View Gem
7.13ct Purple Kunzite, Oval, VS
Kunzite Product Video (453617)

7.13ct Purple Kunzite, Oval, VS

16.7 x 7.7 mm

$ 195.30

View Gem
27.53ct Multicolor Jasper, Oval, Opaque

27.53ct Multicolor Jasper, Oval, Opaque

31.6 x 23.3 mm

$ 18.71

View Gem
31.57ct Multicolor Jasper, Pear Shape, Opaque

31.57ct Multicolor Jasper, Pear Shape, Opaque

30 x 22 mm (calibrated)

$ 25.95

View Gem
41.48ct Multicolor Labradorite, Oval, Opaque

41.48ct Multicolor Labradorite, Oval, Opaque

37.2 x 22.3 mm

$ 37.18

View Gem
2.43ctw Green Peridot, Emerald Cut, VVS-VS

2.43ctw Green Peridot, Emerald Cut, VVS-VS

6 x 4 mm (calibrated)

$ 66.57

View Gem
5.55ct Multicolor Fire Agate, Fancy, Opaque

5.55ct Multicolor Fire Agate, Fancy, Opaque

13.4 x 9.9 mm

$ 41.72

View Gem
1.22ct Yellow Citrine, Round, VVS-VS

1.22ct Yellow Citrine, Round, VVS-VS

7 mm (calibrated)

$ 8.10

View Gem
2.95ctw Blue Kyanite, Oval, SI

2.95ctw Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 61.41

View Gem
0.97ctw Yellow Citrine, Marquise, VVS-VS

0.97ctw Yellow Citrine, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 5.79

View Gem
1 2 3
...
77
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

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
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 -> 9 star ratings

It was great!

Posted By Annie in September, 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