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
0.25ct Orange Spessartite Garnet, Oval, VS

0.25ct Orange Spessartite Garnet, Oval, VS

4 x 3.1 mm

$ 8.72

View Gem
1.25ct Multicolor Opal, Oval, Translucent

1.25ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 54.78

View Gem
4.21ctw Red Pyrope Garnet, Marquise, VVS-VS

4.21ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 46.26

View Gem
195.90ct White Dendritic Agate, Pear Shape, Opaque

195.90ct White Dendritic Agate, Pear Shape, Opaque

74 x 48.1 mm

$ 97.56

View Gem
1.37ct Green Peridot, Oval, VS

1.37ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 15.01

View Gem
0.17ctw White Diamond, Round, VVS-VS

0.17ctw White Diamond, Round, VVS-VS

2.9 mm (calibrated)

$ 308.86

View Gem
1.28ct Orange Spessartite Garnet, Oval, VS-SI

1.28ct Orange Spessartite Garnet, Oval, VS-SI

7.5 x 6.1 mm

$ 308.10

View Gem
6.32ct Turquoise Grandidierite, Oval, SI-I1
Grandidierite Product Video (548056)

6.32ct Turquoise Grandidierite, Oval, SI-I1

12.9 x 9.8 mm

$ 207.72

View Gem
2.00ct Pink Tourmaline, Emerald Cut, SI

2.00ct Pink Tourmaline, Emerald Cut, SI

9.4 x 5.7 mm

$ 98.60

View Gem
10.97ct Multicolor Boulder Opal, Cushion, Opaque

10.97ct Multicolor Boulder Opal, Cushion, Opaque

17 x 11.4 mm

$ 54.63

View Gem
1.62ct Pink Strawberry Quartz, Round, Transparent

1.62ct Pink Strawberry Quartz, Round, Transparent

8 mm (calibrated)

$ 12.42

View Gem
1.88ctw Orange Sunstone, Oval, Translucent

1.88ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 13.11

View Gem
10.93ct Yellow Rutile Quartz, Pear Shape, Translucent

10.93ct Yellow Rutile Quartz, Pear Shape, Translucent

19 x 13.9 mm

$ 29.70

View Gem
25.96ct Violet Jadeite, Oval, Opaque

25.96ct Violet Jadeite, Oval, Opaque

21.7 x 15.8 mm

$ 42.66

View Gem
17.52ct Multicolor Quartz With Marcasite, Oval, Transparent

17.52ct Multicolor Quartz With Marcasite, Oval, Transparent

21.8 x 14.3 mm

$ 115.17

View Gem
26.25ct Multicolor Jasper, Oval, Opaque

26.25ct Multicolor Jasper, Oval, Opaque

33.6 x 21.4 mm

$ 21.57

View Gem
68.44ct Brown Tiger'S Eye Matrix, Fancy, Opaque

68.44ct Brown Tiger'S Eye Matrix, Fancy, Opaque

55.5 x 19.8 mm

$ 38.85

View Gem
1.53ctw Yellow Citrine, Oval, Transparent

1.53ctw Yellow Citrine, Oval, Transparent

10 x 4.1 mm

$ 11.74

View Gem
23.44ct Gray Hematite, Heart, Opaque

23.44ct Gray Hematite, Heart, Opaque

20.4 x 19.1 mm

$ 51.36

View Gem
0.95ctw Yellow Citrine, Heart, VVS-VS

0.95ctw Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 7.57

View Gem
2.93ct Violet Amethyst, Trillion, VS

2.93ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 14.59

View Gem
0.85ct Green Chrome Diopside, Marquise, VS

0.85ct Green Chrome Diopside, Marquise, VS

10 x 5 mm (calibrated)

$ 21.17

View Gem
0.94ctw Green Peridot, Pear Shape, VVS-VS

0.94ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 8.23

View Gem
0.49ct White Rainbow Moonstone, Round, Transparent

0.49ct White Rainbow Moonstone, Round, Transparent

5 mm (calibrated)

$ 15.62

View Gem
1 2 3
...
1631
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

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

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