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

45.48ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

35.2 x 20.4 mm

$ 45.30

View Gem

0.40ct Blue Kyanite, Round, VS-SI

4 mm (calibrated)

$ 9.96

View Gem

2.98ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 22.86

View Gem

0.52ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.6 x 4 mm

$ 107.90

View Gem

2.23ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 4.47

View Gem

10.97ct Multicolor Fire Agate, Fancy, Opaque

16.6 x 13.9 mm

$ 86.06

View Gem

1.19ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 29.63

View Gem

2.40ct Green Peridot, Cushion, VS

7.9 x 7.3 mm

$ 95.11

View Gem

3.56ctw Multicolor Opal, Square, Translucent

3.8 x 3.6 mm

$ 25.28

View Gem

27.54ct Green Serpentine, Oval, Translucent

26.6 x 17.1 mm

$ 58.97

View Gem

1.42ct Green Tourmaline, Round, Transparent

7 mm (calibrated)

$ 21.66

View Gem

0.71ct Yellow Citrine, Pear Shape, VS

7 x 5 mm (calibrated)

$ 3.54

View Gem

1.46ct Multicolor Labradorite, Marquise, Translucent

10 x 5 mm (calibrated)

$ 3.23

View Gem

0.93ct Yellow Citrine, Trillion, VVS-VS

7 x 7 mm (calibrated)

$ 7.13

View Gem

0.95ct Green Tourmaline, Round, Transparent

6 mm (calibrated)

$ 19.71

View Gem

1.30ct Pink Strawberry Quartz, Oval, Translucent

7 x 5 mm (calibrated)

$ 6.49

View Gem

3.96ctw White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 67.41

View Gem

1.10ct Purple Spinel, Cushion, VS

6.4 x 5.6 mm

$ 109.56

View Gem

19.90ct White Rainbow Moonstone, Oval, Translucent

21.2 x 14.1 mm

$ 16.52

View Gem

1.42ctw Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 19.80

View Gem

12.96ct White Rainbow Moonstone, Fancy, Transparent

21 x 11.7 mm

$ 103.27

View Gem

22.20ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 176.89

View Gem

0.94ct Green Tourmaline, Emerald Cut, VVS

14.6 x 3.2 mm

$ 23.41

View Gem

4.66ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 35.74

View Gem
1 2 3
...
1329
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 -> 9 star ratings

Will know more once order received

Posted By Jim in September, 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

Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
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

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

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