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
2.88ctw Orange Hessonite Garnet, Oval, VS-SI

2.88ctw Orange Hessonite Garnet, Oval, VS-SI

8 x 6 mm (calibrated)

$ 57.37

View Gem
5.87ct Pink Strawberry Quartz, Oval, Translucent

5.87ct Pink Strawberry Quartz, Oval, Translucent

14 x 10 mm (calibrated)

$ 35.37

View Gem
5.07ctw Yellow Citrine, Oval, VVS-VS

5.07ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 38.89

View Gem
19.96ctw Multicolor Moss Agate, Fancy, Translucent

19.96ctw Multicolor Moss Agate, Fancy, Translucent

23.2 x 16.2 mm

$ 19.88

View Gem
1.45ct Purple Tourmaline, Oval, VS

1.45ct Purple Tourmaline, Oval, VS

8.1 x 6.3 mm

$ 216.63

View Gem
1.46ct Orange Hessonite Garnet, Emerald Cut, VS
Hessonite Garnet Product Video (567688)

1.46ct Orange Hessonite Garnet, Emerald Cut, VS

6.3 x 6.2 mm

$ 27.19

View Gem
3.81ctw Red Pyrope Garnet, Heart, VVS-VS

3.81ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 29.22

View Gem
10.10ct Pink Rose Quartz, Pear Shape, Transparent
Rose Quartz Product Video (501484)

10.10ct Pink Rose Quartz, Pear Shape, Transparent

20.5 x 13.5 mm

$ 35.19

View Gem
3.52ctw Red Pyrope Garnet, Square, VS

3.52ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 26.99

View Gem
14.41ct Multicolor Agate, Oval, Opaque

14.41ct Multicolor Agate, Oval, Opaque

15.1 x 13.9 mm

$ 24.40

View Gem
1.67ct Green Tourmaline, Emerald Cut, VVS-VS

1.67ct Green Tourmaline, Emerald Cut, VVS-VS

19.3 x 3.3 mm

$ 43.92

View Gem
6.61ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (438941)

6.61ct Yellow Apatite, Emerald Cut, VS

10.6 x 10.4 mm

$ 340.37

View Gem
1.09ct Yellow Beryl, Oval, VVS-VS

1.09ct Yellow Beryl, Oval, VVS-VS

8.3 x 6.3 mm

$ 21.71

View Gem
1.71ct Multicolor Opal, Oval, Transparent

1.71ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 42.58

View Gem
1.16ct White Rainbow Moonstone, Oval, Transparent

1.16ct White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 36.97

View Gem
22.80ct Pink Coral, Fancy, Opaque
Coral Product Video (344912)

22.80ct Pink Coral, Fancy, Opaque

30.9 x 20 mm

$ 317.92

View Gem
26.17ct Multicolor Agate, Oval, Opaque

26.17ct Multicolor Agate, Oval, Opaque

20 x 15 mm (calibrated)

$ 44.31

View Gem
24.36ct Gray Hematite, Square, Opaque
Hematite Product Video (554031)

24.36ct Gray Hematite, Square, Opaque

16x16 mm (calibrated)

$ 24.55

View Gem
23.12ct Multicolor Bloodstone, Fancy, Opaque

23.12ct Multicolor Bloodstone, Fancy, Opaque

28.2 x 19.2 mm

$ 10.36

View Gem
1.39ct Pink Tourmaline, Cushion, VS

1.39ct Pink Tourmaline, Cushion, VS

6.8 x 6.3 mm

$ 207.67

View Gem
22.08ct Brown Tiger'S Eye, Oval, Opaque

22.08ct Brown Tiger'S Eye, Oval, Opaque

26.5 x 16.8 mm

$ 24.19

View Gem
33.88ct Multicolor Jasper, Baguette, Opaque

33.88ct Multicolor Jasper, Baguette, Opaque

24.4 x 16.9 mm

$ 19.23

View Gem
3.75ctw Multicolor Andalusite, Oval, VS-SI

3.75ctw Multicolor Andalusite, Oval, VS-SI

6 x 4 mm (calibrated)

$ 184.89

View Gem
42.17ct Multicolor Coral, Pear Shape, Opaque

42.17ct Multicolor Coral, Pear Shape, Opaque

40 x 24.8 mm

$ 56.28

View Gem
1 2 3
...
1259
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 -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
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 purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 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 -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

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