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

0.60ct Yellow Zircon, Oval, VVS

5.2 x 4.1 mm

$ 14.94

View Gem

2.09ctw Pink Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 114.49

View Gem

2.14ct Red Almandine Garnet, Baguette, VVS

9.9 x 5 mm

$ 17.76

View Gem

3.32ctw Brown Tiger'S Eye, Oval, Opaque

8.3 x 6.4 mm

$ 3.30

View Gem

3.29ct Turquoise Fluorite, Oval, Transparent

9 x 7 mm (calibrated)

$ 13.11

View Gem

0.80ct Orange Zircon, Oval, VS

6 x 4 mm (calibrated)

$ 11.95

View Gem

4.73ct Yellow Citrine, Oval, VVS-VS

14.1 x 9.4 mm

$ 31.09

View Gem

14.43ct Blue Cat'S Eye Aquamarine, Oval, Transparent

17.5 x 10.5 mm

$ 253.59

View Gem

4.54ct Pink Strawberry Quartz, Oval, Translucent

13.3 x 9.5 mm

$ 27.26

View Gem

2.16ct Brown Tiger'S Eye, Oval, Opaque

9 x 7 mm (calibrated)

$ 2.15

View Gem

20.61ct Brown Moonstone, Oval, Opaque

21.4 x 16.1 mm

$ 45.16

View Gem

2.35ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 12.88

View Gem

12.50ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 68.48

View Gem

1.55ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 30.88

View Gem

2.18ct Yellow Apatite, Heart, VS

8.9 x 8 mm

$ 112.26

View Gem

4.85ct Multicolor Agate, Fancy, Opaque

9 x 9 mm (calibrated)

$ 4.59

View Gem

10.63ct Pink Rose Quartz, Emerald Cut, Transparent

13 x 13 mm (calibrated)

$ 58.23

View Gem

4.52ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 4.50

View Gem

2.18ct Orange Hessonite Garnet, Cushion, VVS-VS

7 x 7 mm (calibrated)

$ 37.14

View Gem

1.57ct Yellow Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 26.91

View Gem

0.71ct Yellow Color-Change Diaspore, Cushion, VVS-VS

7.6 x 4.5 mm

$ 24.93

View Gem

4.57ct Orange Spessartite Garnet, Oval, Transparent

9.2 x 8.4 mm

$ 113.79

View Gem

3.25ctw Blue Kyanite, Oval, VS-SI

8 x 6 mm (calibrated)

$ 71.21

View Gem

2.28ctw Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 15.89

View Gem
1 2 3
...
894
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 -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate
Enlarged Gemstone Image