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
1.06ct Purple Rhodolite Garnet, Oval, VS

1.06ct Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 28.15

View Gem
5.71ctw Pink Strawberry Quartz, Oval, Transparent

5.71ctw Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 42.43

View Gem
5.49ct Pink Morganite, Pear Shape, Transparent

5.49ct Pink Morganite, Pear Shape, Transparent

16.4 x 9.8 mm

$ 63.10

View Gem
8.04ctw Green Prehnite, Oval, Transparent

8.04ctw Green Prehnite, Oval, Transparent

8.1 x 7.3 mm

$ 61.66

View Gem
167.02ct Pink Rose Quartz, Pear Shape, Transparent
Rose Quartz Product Video (522441)

167.02ct Pink Rose Quartz, Pear Shape, Transparent

46 x 29.3 mm

$ 365.97

View Gem
3.56ct Yellow Citrine, Square, VVS-VS

3.56ct Yellow Citrine, Square, VVS-VS

9 x 9 mm (calibrated)

$ 27.30

View Gem
0.94ctw Red Pyrope Garnet, Square, VS

0.94ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 7.21

View Gem
1.67ctw Red Pyrope Garnet, Square, VS

1.67ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.81

View Gem
2.86ctw Orange Hessonite Garnet, Emerald Cut, VS

2.86ctw Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 56.41

View Gem
0.67ct Yellow Citrine, Pear Shape, VVS-VS

0.67ct Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 3.34

View Gem
15.30ct Multicolor Jasper, Oval, Opaque

15.30ct Multicolor Jasper, Oval, Opaque

20 x 15 mm (calibrated)

$ 25.15

View Gem
7.60ct Green Amazonite, Marquise, Opaque

7.60ct Green Amazonite, Marquise, Opaque

20.1 x 10 mm

$ 18.23

View Gem
1.53ct Brown Color-Change Garnet, Oval, VS

1.53ct Brown Color-Change Garnet, Oval, VS

7 x 5.9 mm

$ 122.23

View Gem
0.33ct Yellow Color-Change Diaspore, Trillion, VS

0.33ct Yellow Color-Change Diaspore, Trillion, VS

4.2 x 4.2 mm

$ 17.42

View Gem
9.06ct Red Star Garnet, Oval, Opaque

9.06ct Red Star Garnet, Oval, Opaque

13.4 x 9.9 mm

$ 9.38

View Gem
1.31ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458238)

1.31ctw Green Demantoid Garnet, Oval, VS

4.4 x 3.5 mm

$ 143.52

View Gem
18.98ct Gray Hematite, Emerald Cut, Opaque

18.98ct Gray Hematite, Emerald Cut, Opaque

20.3 x 15.8 mm

$ 20.80

View Gem
4.56ct Violet Amethyst, Pear Shape, VS

4.56ct Violet Amethyst, Pear Shape, VS

15 x 10 mm (calibrated)

$ 29.98

View Gem
12.08ct Green Druzy Variscite, Fancy, Opaque

12.08ct Green Druzy Variscite, Fancy, Opaque

26.6 x 13.5 mm

$ 18.41

View Gem
1.74ctw Red Pyrope Garnet, Heart, VVS-VS

1.74ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 13.35

View Gem
0.79ct Red Fire Opal, Oval, Transparent

0.79ct Red Fire Opal, Oval, Transparent

8.4 x 6.4 mm

$ 27.54

View Gem
13.88ct Green Aragonite, Square, Opaque

13.88ct Green Aragonite, Square, Opaque

15.1 x 14.2 mm

$ 16.24

View Gem
15.14ct White Rainbow Moonstone, Pear Shape, Translucent

15.14ct White Rainbow Moonstone, Pear Shape, Translucent

22.8 x 17 mm

$ 105.56

View Gem
0.83ct Green Tourmaline, Emerald Cut, VS

0.83ct Green Tourmaline, Emerald Cut, VS

10.4 x 3.8 mm

$ 20.67

View Gem
1 2 3
...
168
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

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 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

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 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