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
2.94ct Yellow Rutile Quartz, Pear Shape, Transparent

2.94ct Yellow Rutile Quartz, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 7.92

View Gem
4.28ct Yellow Citrine, Oval, VS

4.28ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 23.45

View Gem
4.16ctw Multicolor Spectrolite, Oval, Opaque

4.16ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 19.02

View Gem
1.62ct Yellow Citrine, Emerald Cut, VVS-VS

1.62ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 12.91

View Gem
53.26ct Violet Charoite, Cushion, Opaque
Charoite Product Video (567097)

53.26ct Violet Charoite, Cushion, Opaque

36 x 24.5 mm

$ 99.78

View Gem
0.64ct Green Peridot, Marquise, VS

0.64ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 10.20

View Gem
21.27ct Violet Amethyst, Cushion, VVS-VS

21.27ct Violet Amethyst, Cushion, VVS-VS

18 x 18 mm (calibrated)

$ 148.30

View Gem
1.08ct White Sillimanite Cat'S Eye, Oval, Transparent

1.08ct White Sillimanite Cat'S Eye, Oval, Transparent

6.1 x 5.5 mm

$ 4.30

View Gem
31.43ct Gray Hematite, Pear Shape, Opaque

31.43ct Gray Hematite, Pear Shape, Opaque

25.9 x 16 mm

$ 27.85

View Gem
2.38ct Yellow Beryl, Oval, VVS-VS

2.38ct Yellow Beryl, Oval, VVS-VS

10.9 x 8.5 mm

$ 47.41

View Gem
1.62ct Green Tourmaline, Emerald Cut, VS-SI

1.62ct Green Tourmaline, Emerald Cut, VS-SI

17.7 x 3.3 mm

$ 53.24

View Gem
0.48ct Blue Kyanite, Round, SI

0.48ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 11.95

View Gem
0.33ct Yellow Color-Change Diaspore, Oval, VVS

0.33ct Yellow Color-Change Diaspore, Oval, VVS

5.4 x 3.9 mm

$ 17.42

View Gem
1.71ct Green Tourmaline, Baguette, VS

1.71ct Green Tourmaline, Baguette, VS

9.7 x 4.4 mm

$ 59.61

View Gem
0.90ct Orange Hessonite Garnet, Square, VS

0.90ct Orange Hessonite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 15.70

View Gem
0.67ct Orange Citrine, Oval, VVS-VS

0.67ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 6.67

View Gem
79.52ct Multicolor Jasper, Oval, Opaque

79.52ct Multicolor Jasper, Oval, Opaque

47.3 x 27.6 mm

$ 45.93

View Gem
0.84ct Green Tourmaline, Emerald Cut, VS

0.84ct Green Tourmaline, Emerald Cut, VS

4.7 x 4.6 mm

$ 41.83

View Gem
2.80ctw Red Rhodolite Garnet, Square, VS

2.80ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 24.51

View Gem
1.57ctw Green Demantoid Garnet, Oval, VS

1.57ctw Green Demantoid Garnet, Oval, VS

4.5 x 3.4 mm

$ 172.01

View Gem
3.28ct Pink Strawberry Quartz, Oval, Translucent

3.28ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 39.20

View Gem
20.96ct Violet Amethyst, Emerald Cut, VVS

20.96ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 146.13

View Gem
4.62ct Yellow Citrine, Oval, VVS-VS

4.62ct Yellow Citrine, Oval, VVS-VS

10.9 x 9.8 mm

$ 32.21

View Gem
5.49ctw Yellow Citrine, Oval, VVS

5.49ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 30.08

View Gem
1 2 3
...
961
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

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 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

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

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