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
0.80ctw Green Peridot, Pear Shape, VVS-VS

0.80ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 6.13

View Gem
2.37ct Orange Moonstone, Cushion, Translucent

2.37ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.72

View Gem
9.52ct Multicolor Pietersite, Trillion, Opaque

9.52ct Multicolor Pietersite, Trillion, Opaque

18.7 x 16.7 mm

$ 23.32

View Gem
8.99ct Brown Tiger'S Eye, Oval, Opaque

8.99ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 8.96

View Gem
2.59ctw Multicolor Opal, Oval, Translucent

2.59ctw Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 56.67

View Gem
1.21ct Brown Color-Change Garnet, Oval, VVS-VS

1.21ct Brown Color-Change Garnet, Oval, VVS-VS

7.1 x 5.5 mm

$ 96.66

View Gem
2.90ct Pink Morganite, Round, Transparent

2.90ct Pink Morganite, Round, Transparent

9 mm (calibrated)

$ 31.77

View Gem
0.84ct Yellow Morganite, Pear Shape, VS

0.84ct Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 36.81

View Gem
1.23ct Pink Tourmaline, Oval, Transparent

1.23ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 20.38

View Gem
3.35ctw White Topaz, Square, VVS-VS

3.35ctw White Topaz, Square, VVS-VS

3.8 x 3.7 mm

$ 25.70

View Gem
1.46ctw Multicolor Opal, Round, Transparent

1.46ctw Multicolor Opal, Round, Transparent

6 mm (calibrated)

$ 34.08

View Gem
5.77ct Multicolor Boulder Opal, Fancy, Translucent

5.77ct Multicolor Boulder Opal, Fancy, Translucent

18.1 x 11.1 mm

$ 28.73

View Gem
11.83ct Multicolor Opal, Pear Shape, Transparent
Opal Product Video (746953)

11.83ct Multicolor Opal, Pear Shape, Transparent

18.9 x 14.3 mm

$ 589.13

View Gem
2.45ctw Yellow Beryl, Oval, VS

2.45ctw Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 61.01

View Gem
1.07ctw Blue Kyanite, Oval, SI-I1

1.07ctw Blue Kyanite, Oval, SI-I1

6 x 4 mm (calibrated)

$ 23.45

View Gem
10.13ct Brown Smoky Quartz, Flower Cut, Transparent

10.13ct Brown Smoky Quartz, Flower Cut, Transparent

16 x 12 mm (calibrated)

$ 37.62

View Gem
5.40ctw Purple Rhodolite Garnet, Trillion, VS

5.40ctw Purple Rhodolite Garnet, Trillion, VS

5.2 x 5.2 mm

$ 47.33

View Gem
47.54ct Multicolor Jasper, Fancy, Opaque

47.54ct Multicolor Jasper, Fancy, Opaque

29.3 x 23.6 mm

$ 22.92

View Gem
6.20ctw Multicolor Pietersite, Pear Shape, Opaque

6.20ctw Multicolor Pietersite, Pear Shape, Opaque

14 x 8.5 mm

$ 15.19

View Gem
26.93ctw Multicolor Fossil Coral, Oval, Opaque

26.93ctw Multicolor Fossil Coral, Oval, Opaque

20.4 x 14.3 mm

$ 33.63

View Gem
5.19ctw Brown Smoky Quartz, Oval, VVS-VS

5.19ctw Brown Smoky Quartz, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 31.02

View Gem
4.24ctw Multicolor Spectrolite, Oval, Opaque

4.24ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 19.98

View Gem
1.47ct Yellow Citrine, Oval, VVS-VS

1.47ct Yellow Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 11.27

View Gem
26.51ct Multicolor Feather Pyrite, Oval, Opaque

26.51ct Multicolor Feather Pyrite, Oval, Opaque

27.8 x 19.1 mm

$ 20.68

View Gem
1 2 3
...
1451
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

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
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 -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image