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

5.28ct Multicolor Labradorite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 11.67

View Gem

2.68ct Orange Hessonite Garnet, Oval, VS-SI

9.3 x 7.7 mm

$ 58.72

View Gem

1.48ct Orange Hessonite Garnet, Oval, VS

7.5 x 6.2 mm

$ 24.32

View Gem

13.39ct Brown Tiger'S Eye, Oval, Opaque

20 x 15 mm (calibrated)

$ 13.34

View Gem

1.41ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 11.24

View Gem

3.45ct Pink Kunzite, Cushion, VVS

8.5 x 8.1 mm

$ 94.94

View Gem

2.64ctw Brown Tiger'S Eye, Oval, Opaque

8 x 6 mm (calibrated)

$ 2.63

View Gem

15.65ct Multicolor Pietersite, Marquise, Opaque

34 x 14.6 mm

$ 36.64

View Gem

6.34ct Green Quartz Cat'S Eye, Oval, Opaque

12 x 10 mm (calibrated)

$ 20.83

View Gem

9.50ct Multicolor Agate, Oval, Translucent

14.4 x 12.5 mm

$ 18.92

View Gem

5.07ct Violet Amethyst, Pear Shape, VVS-VS

15 x 10 mm (calibrated)

$ 33.32

View Gem

3.00ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 19.72

View Gem

0.96ct Brown Diamond, Pear Shape, SI

8 x 5 mm (calibrated)

$ 2,734.62

View Gem

1.34ctw Green Peridot, Marquise, VVS-VS

7.7 x 4.1 mm

$ 42.94

View Gem

2.61ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 15.95

View Gem

0.65ct Green Tourmaline, Emerald Cut, VS

7.7 x 3.8 mm

$ 16.19

View Gem

19.63ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 64.52

View Gem

0.45ct Green Chrysoberyl Cat'S Eye, Oval, Translucent

5 x 4 mm (calibrated)

$ 13.45

View Gem

24.95ct Pink Rose Quartz, Oval, Transparent

20.3 x 15.6 mm

$ 54.67

View Gem

1.09ct Yellow Citrine, Pear Shape, VS

9 x 6 mm (calibrated)

$ 9.75

View Gem

3.13ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 23.46

View Gem

3.37ctw Orange Sunstone, Round, Translucent

8 mm (calibrated)

$ 36.92

View Gem

29.96ct Multicolor Jasper, Oval, Opaque

30.7 x 21 mm

$ 14.77

View Gem

7.04ctw Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 46.27

View Gem
1 2 3
...
723
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

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 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

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

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

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

Posted By Tim in January, 2026
Source: Bizrate
Enlarged Gemstone Image