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

2.01ctw Red Pyrope Garnet, Emerald Cut, VS

5.5 x 3.7 mm

$ 15.42

View Gem

2.06ct Green Peridot, Cushion, VS

7.6 x 7.5 mm

$ 80.81

View Gem

4.74ct Green Prehnite, Fancy, Translucent

12.4 x 9.1 mm

$ 7.79

View Gem

10.26ct Multicolor Pietersite, Marquise, Opaque

28 x 10.2 mm

$ 38.74

View Gem

34.01ct Multicolor Feather Pyrite, Oval, Opaque

27 x 20 mm (calibrated)

$ 26.54

View Gem

2.30ct Green Peridot, Cushion, VVS-VS

8 x 6.9 mm

$ 82.33

View Gem

7.72ct Multicolor Agate, Oval, Opaque

12 x 12 mm (calibrated)

$ 13.06

View Gem

1.48ctw Red Pyrope Garnet, Pear Shape, VS

7 x 5 mm (calibrated)

$ 11.79

View Gem

0.43ct Orange Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 3.21

View Gem

0.15ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 268.16

View Gem

2.11ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 16.19

View Gem

1.00ct Yellow Citrine, Heart, Transparent

6.3 x 6.2 mm

$ 6.97

View Gem

29.52ct Gray Hematite, Pear Shape, Opaque

24.1 x 14.6 mm

$ 29.76

View Gem

34.07ctw Green Prehnite, Fancy, Transparent

20.3 x 12.1 mm

$ 47.41

View Gem

4.09ctw Green Peridot, Round, VS

6 mm (calibrated)

$ 39.97

View Gem

32.00ct Brown Jasper, Fancy, Opaque

30.3 x 25.4 mm

$ 49.09

View Gem

4.14ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 31.76

View Gem

27.95ct Green Jadeite, Oval, Translucent

21.7 x 18.3 mm

$ 76.56

View Gem

1.89ct Red Almandine Garnet, Marquise, VVS

12 x 6 mm (calibrated)

$ 70.59

View Gem

0.91ct Orange Hessonite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 15.89

View Gem

9.35ct Pink Aragonite, Pear Shape, Opaque

21.6 x 13.8 mm

$ 10.94

View Gem

1.47ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.27

View Gem

10.22ct Multicolor Agate, Oval, Opaque

15.3 x 11.9 mm

$ 9.67

View Gem

1.52ct Green Tourmaline, Emerald Cut, VVS

18.2 x 3.2 mm

$ 36.64

View Gem
1 2 3
...
1738
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 -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate
Enlarged Gemstone Image