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
2.10ctw Pink Strawberry Quartz, Round, Transparent

2.10ctw Pink Strawberry Quartz, Round, Transparent

7 mm (calibrated)

$ 32.21

View Gem
1.81ct Orange Sphalerite, Emerald Cut, SI

1.81ct Orange Sphalerite, Emerald Cut, SI

7.1 x 5.2 mm

$ 108.17

View Gem
10.25ct Multicolor Quartz With Marcasite, Pear Shape, Transparent

10.25ct Multicolor Quartz With Marcasite, Pear Shape, Transparent

18 x 13 mm (calibrated)

$ 67.38

View Gem
28.52ct White Rainbow Moonstone, Baguette, Transparent
Rainbow Moonstone Product Video (682542)

28.52ct White Rainbow Moonstone, Baguette, Transparent

32.1 x 11.4 mm

$ 227.25

View Gem
0.69ctw Blue Kyanite, Round, VS-SI
Kyanite Product Video (714377)

0.69ctw Blue Kyanite, Round, VS-SI

4.2 mm

$ 14.32

View Gem
1.12ct Pink Tourmaline, Oval, Transparent

1.12ct Pink Tourmaline, Oval, Transparent

7.6 x 5.7 mm

$ 18.57

View Gem
1.13ct Yellow Citrine, Round, VS

1.13ct Yellow Citrine, Round, VS

7 mm (calibrated)

$ 7.50

View Gem
15.82ct Multicolor Opal, Oval, Transparent
Opal Product Video (752455)

15.82ct Multicolor Opal, Oval, Transparent

22.4 x 17.6 mm

$ 393.92

View Gem
2.14ct Orange Hessonite Garnet, Oval, VS-SI

2.14ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 46.90

View Gem
0.11ctw Black Diamond, Round, Opaque

0.11ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 31.96

View Gem
2.55ct Yellow Citrine, Oval, VVS-VS

2.55ct Yellow Citrine, Oval, VVS-VS

12 x 8 mm (calibrated)

$ 19.56

View Gem
23.41ct Gray Hematite, Heart, Opaque

23.41ct Gray Hematite, Heart, Opaque

20.4 x 19.1 mm

$ 51.29

View Gem
12.20ct Green Bloodstone, Oval, Opaque

12.20ct Green Bloodstone, Oval, Opaque

15.3 x 12.4 mm

$ 46.78

View Gem
2.72ct Orange Hessonite Garnet, Cushion, VS-SI

2.72ct Orange Hessonite Garnet, Cushion, VS-SI

9 x 7 mm (calibrated)

$ 44.70

View Gem
2.02ctw Red Pyrope Garnet, Marquise, VVS

2.02ctw Red Pyrope Garnet, Marquise, VVS

10 x 5 mm

$ 17.71

View Gem
0.87ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.87ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.7 x 4.6 mm

$ 26.69

View Gem
2.44ct Pink Strawberry Quartz, Oval, Transparent

2.44ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 15.11

View Gem
1.62ct Green Peridot, Oval, VS

1.62ct Green Peridot, Oval, VS

8.9 x 6.7 mm

$ 53.24

View Gem
4.63ct Multicolor Ruby-Zoisite, Round, Opaque

4.63ct Multicolor Ruby-Zoisite, Round, Opaque

9.5 mm (calibrated)

$ 13.84

View Gem
4.15ct Green Jade, Oval, Opaque

4.15ct Green Jade, Oval, Opaque

12 x 10 mm (calibrated)

$ 8.27

View Gem
1.13ct Green Chrome Diopside, Marquise, VS-SI

1.13ct Green Chrome Diopside, Marquise, VS-SI

10 x 5 mm (calibrated)

$ 28.14

View Gem
2.59ctw Green Tsavorite Garnet, Oval, VS

2.59ctw Green Tsavorite Garnet, Oval, VS

5 x 3 mm (calibrated)

$ 141.88

View Gem
0.64ct Yellow Citrine, Pear Shape, VVS

0.64ct Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 3.19

View Gem
19.81ctw Multicolor Fossil Coral, Oval, Opaque

19.81ctw Multicolor Fossil Coral, Oval, Opaque

19.7 x 11.7 mm

$ 32.56

View Gem
1 2 3
...
97
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

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 -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image