X
Gemstone Search
90,000+ Happy Customers
20+ Years In Business
Call Us Mon–Fri 8am–5pm

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

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
1.64ct Yellow Citrine, Pear Shape, VVS

1.64ct Yellow Citrine, Pear Shape, VVS

10 x 7 mm (calibrated)

$ 9.36

View Gem
27.91ct Multicolor Opal, Pear Shape, Opaque

27.91ct Multicolor Opal, Pear Shape, Opaque

30 x 22 mm (calibrated)

$ 83.40

View Gem
1.41ct Green Tourmaline, Oval, VVS-VS

1.41ct Green Tourmaline, Oval, VVS-VS

7.4 x 6 mm

$ 210.65

View Gem
20.82ct Multicolor Jasper, Trillion, Opaque

20.82ct Multicolor Jasper, Trillion, Opaque

21.3 x 19.5 mm

$ 11.82

View Gem
2.47ct Pink Strawberry Quartz, Oval, Transparent

2.47ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 18.94

View Gem
3.92ct Multicolor Pietersite, Pear Shape, Opaque

3.92ct Multicolor Pietersite, Pear Shape, Opaque

14.6 x 8.8 mm

$ 11.71

View Gem
3.77ctw White Rainbow Moonstone, Pear Shape, Transparent
Rainbow Moonstone Product Video (350707)

3.77ctw White Rainbow Moonstone, Pear Shape, Transparent

5.2 x 5.1 mm

$ 58.65

View Gem
1.43ct Red Tourmaline, Oval, Transparent

1.43ct Red Tourmaline, Oval, Transparent

7.6 x 5.8 mm

$ 24.51

View Gem
23.05ct Multicolor Pietersite, Baguette, Opaque

23.05ct Multicolor Pietersite, Baguette, Opaque

25.6 x 13.9 mm

$ 68.87

View Gem
10.14ctw Green Prehnite, Fancy, Translucent

10.14ctw Green Prehnite, Fancy, Translucent

15.2 x 10.5 mm

$ 16.67

View Gem
3.81ct Orange Imperial Topaz, Pear Shape, VVS
Imperial Topaz Product Video (346641)

3.81ct Orange Imperial Topaz, Pear Shape, VVS

15.7 x 7.2 mm

$ 2,337.57

View Gem
14.24ct Brown Tiger'S Eye, Baguette, Opaque

14.24ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 14.18

View Gem
8.96ctw Black Spinel, Trillion, Opaque

8.96ctw Black Spinel, Trillion, Opaque

10 x 10 mm (calibrated)

$ 49.09

View Gem
0.93ct Purple Spinel, Cushion, VS

0.93ct Purple Spinel, Cushion, VS

5.7 x 5.1 mm

$ 46.75

View Gem
1.02ct Pink Morganite, Pear Shape, VS

1.02ct Pink Morganite, Pear Shape, VS

9.3 x 5.5 mm

$ 111.75

View Gem
2.02ct Red Almandine Garnet, Oval, VVS

2.02ct Red Almandine Garnet, Oval, VVS

9 x 7 mm (calibrated)

$ 75.45

View Gem
4.48ct Pink Rose Quartz, Emerald Cut, Transparent

4.48ct Pink Rose Quartz, Emerald Cut, Transparent

10 x 10 mm (calibrated)

$ 24.54

View Gem
0.76ct White Rainbow Moonstone, Oval, Transparent

0.76ct White Rainbow Moonstone, Oval, Transparent

7 x 5 mm (calibrated)

$ 12.87

View Gem
1.14ct Violet Amethyst, Oval, Transparent

1.14ct Violet Amethyst, Oval, Transparent

10.1 x 5 mm

$ 7.95

View Gem
6.37ct Yellow Citrine, Emerald Cut, VVS-VS

6.37ct Yellow Citrine, Emerald Cut, VVS-VS

13.7 x 9.7 mm

$ 48.85

View Gem
21.04ct White Rainbow Moonstone, Pear Shape, Translucent

21.04ct White Rainbow Moonstone, Pear Shape, Translucent

24.7 x 14.3 mm

$ 146.69

View Gem
1.42ctw Green Demantoid Garnet, Oval, VS

1.42ctw Green Demantoid Garnet, Oval, VS

4.5 x 3.6 mm

$ 124.46

View Gem
0.75ct Green Peridot, Oval, VS

0.75ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 11.50

View Gem
5.86ct Violet Amethyst, Pear Shape, VVS-VS

5.86ct Violet Amethyst, Pear Shape, VVS-VS

15 x 10 mm (calibrated)

$ 44.94

View Gem
1 2 3
...
1385
Choose Page
1 - 1895

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

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

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