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
5.54ct Multicolor Dendritic Agate, Baguette, Transparent

5.54ct Multicolor Dendritic Agate, Baguette, Transparent

15.4 x 8.9 mm

$ 19.68

View Gem
2.40ct Red Almandine Garnet, Oval, VS

2.40ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 89.64

View Gem
32.72ct Multicolor Jasper, Cushion, Opaque

32.72ct Multicolor Jasper, Cushion, Opaque

27.3 x 26.6 mm

$ 17.93

View Gem
0.48ct Pink Morganite, Round, VS-SI

0.48ct Pink Morganite, Round, VS-SI

5.5 mm (calibrated)

$ 19.92

View Gem
3.12ct Green Malachite, Oval, Opaque

3.12ct Green Malachite, Oval, Opaque

9 x 7 mm (calibrated)

$ 2.39

View Gem
1.24ct Green Tourmaline, Emerald Cut, VVS-VS

1.24ct Green Tourmaline, Emerald Cut, VVS-VS

18 x 2.9 mm

$ 26.21

View Gem
4.88ctw White Topaz, Square, VVS-VS

4.88ctw White Topaz, Square, VVS-VS

4 x 4 mm (calibrated)

$ 35.72

View Gem
3.65ctw Brown Smoky Quartz, Round, VVS-VS

3.65ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 20.00

View Gem
1.83ct Orange Hessonite Garnet, Oval, VS

1.83ct Orange Hessonite Garnet, Oval, VS

8.3 x 6.8 mm

$ 34.63

View Gem
0.66ct Orange Spessartite Garnet, Oval, SI

0.66ct Orange Spessartite Garnet, Oval, SI

6.2 x 4.4 mm

$ 22.35

View Gem
4.61ct Multicolor Quartz With Marcasite, Fancy, Transparent

4.61ct Multicolor Quartz With Marcasite, Fancy, Transparent

14.3 x 9.9 mm

$ 25.26

View Gem
30.59ct Multicolor Labradorite, Round, Translucent

30.59ct Multicolor Labradorite, Round, Translucent

25.3 mm

$ 56.37

View Gem
2.06ctw Pink Strawberry Quartz, Round, Transparent

2.06ctw Pink Strawberry Quartz, Round, Transparent

7 mm (calibrated)

$ 31.59

View Gem
0.80ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.80ct Yellow Color-Change Diaspore, Emerald Cut, VS

7.3 x 4.5 mm

$ 26.29

View Gem
6.16ct Turquoise Grandidierite, Oval, Translucent
Grandidierite Product Video (471996)

6.16ct Turquoise Grandidierite, Oval, Translucent

12 x 10 mm (calibrated)

$ 674.89

View Gem
0.58ct Red Pyrope Garnet, Heart, VVS-VS

0.58ct Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 4.62

View Gem
0.53ct Multicolor Opal, Pear Shape, Transparent

0.53ct Multicolor Opal, Pear Shape, Transparent

8 x 5 mm (calibrated)

$ 13.20

View Gem
7.03ctw Green Amazonite, Cushion, Opaque

7.03ctw Green Amazonite, Cushion, Opaque

7.3 x 7.3 mm

$ 17.10

View Gem
1.33ct Purple Spinel, Cushion, VVS

1.33ct Purple Spinel, Cushion, VVS

6.3 x 6 mm

$ 104.91

View Gem
1.86ct Orange Spessartite Garnet, Oval, Transparent

1.86ct Orange Spessartite Garnet, Oval, Transparent

7.6 x 6.3 mm

$ 46.31

View Gem
4.43ctw Yellow Citrine, Oval, VVS

4.43ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 24.27

View Gem
4.37ct Violet Amethyst, Pear Shape, VVS

4.37ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 31.74

View Gem
3.35ct Multicolor Labradorite, Pear Shape, Translucent

3.35ct Multicolor Labradorite, Pear Shape, Translucent

13 x 9 mm (calibrated)

$ 7.41

View Gem
35.32ct Multicolor Jasper, Fancy, Opaque

35.32ct Multicolor Jasper, Fancy, Opaque

27 x 20 mm (calibrated)

$ 38.69

View Gem
1 2 3
...
139
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

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

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