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

2.44ctw Green Demantoid Garnet, Oval, VS

4 x 3.1 mm

$ 179.86

View Gem

1.52ct Pink Tourmaline, Pear Shape, VS

7.3 x 7.1 mm

$ 211.95

View Gem

1.71ct Yellow Sphene, Oval, Translucent

7 x 6.6 mm

$ 9.37

View Gem

6.82ct Multicolor Pietersite, Marquise, Opaque

24.8 x 7.1 mm

$ 20.38

View Gem

3.75ctw Brown Moonstone, Flower Cut, Translucent

9 x 9 mm (calibrated)

$ 16.43

View Gem

3.12ctw White Rainbow Moonstone, Square, Transparent

3.2 x 3.1 mm

$ 58.11

View Gem

0.88ct Yellow Beryl, Trillion, VVS

7.3 x 3.9 mm

$ 17.53

View Gem

2.99ct Purple Kunzite, Emerald Cut, VS

7.4 x 7 mm

$ 82.28

View Gem

2.12ct Yellow Beryl, Trillion, VS

9 x 9 mm (calibrated)

$ 45.42

View Gem

4.68ctw Red Pyrope Garnet, Square, VS

4.2 x 4.1 mm

$ 35.90

View Gem

18.16ct Purple Ruby-Zoisite, Flower Cut, Opaque

16.4 x 14.9 mm

$ 22.07

View Gem

0.25ct Blue Iolite, Emerald Cut, VS-SI

5 x 3 mm (calibrated)

$ 9.96

View Gem

1.03ct Purple Spinel, Cushion, VS

5.8 x 4.7 mm

$ 415.00

View Gem

0.41ct Yellow Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 3.06

View Gem

23.83ctw Multicolor Moss Agate, Pear Shape, Transparent

24.9 x 15 mm

$ 23.74

View Gem

10.59ctw Violet Amethyst, Cushion, VVS-VS

15.2 x 9.1 mm

$ 73.84

View Gem

0.25ct Violet Iolite, Round, VS

4.2 mm

$ 9.96

View Gem

2.30ct Violet Amethyst, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 17.64

View Gem

3.80ct Brown Smoky Quartz, Round, VVS-VS

11 mm (calibrated)

$ 6.24

View Gem

2.16ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 10.76

View Gem

2.15ctw Pink Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 117.78

View Gem

2.12ct Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 12.69

View Gem

16.17ct Violet Amethyst, Emerald Cut, VVS-VS

17.9 x 14.1 mm

$ 112.74

View Gem

3.79ct Violet Amethyst, Pear Shape, VVS

13 x 9 mm (calibrated)

$ 29.07

View Gem
1 2 3
...
844
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 -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak 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

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate
Enlarged Gemstone Image