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
1.76ct Green Sphene, Oval, Transparent

1.76ct Green Sphene, Oval, Transparent

8.1 x 6.3 mm

$ 8.76

View Gem
0.76ct Multicolor Opal, Pear Shape, Transparent

0.76ct Multicolor Opal, Pear Shape, Transparent

9 x 6 mm (calibrated)

$ 18.92

View Gem
28.19ctw Multicolor Fossil Coral, Oval, Opaque

28.19ctw Multicolor Fossil Coral, Oval, Opaque

22.1 x 13.8 mm

$ 35.21

View Gem
0.64ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.64ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6.4 x 3.8 mm

$ 33.78

View Gem
0.90ct Orange Zircon, Oval, VVS-VS

0.90ct Orange Zircon, Oval, VVS-VS

6 x 4.9 mm

$ 13.45

View Gem
3.71ctw Yellow Citrine, Round, VVS

3.71ctw Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 25.86

View Gem
9.89ct Brown Tiger'S Eye, Oval, Opaque

9.89ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 5.82

View Gem
3.17ctw Red Pyrope Garnet, Heart, VVS-VS

3.17ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 24.31

View Gem
1.02ct Purple Spinel, Pear Shape, VVS
Spinel Product Video (400519)

1.02ct Purple Spinel, Pear Shape, VVS

7.6 x 6.1 mm

$ 177.62

View Gem
3.57ctw Brown Smoky Quartz, Round, VS

3.57ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.82

View Gem
3.35ct Pink Morganite, Pear Shape, Transparent

3.35ct Pink Morganite, Pear Shape, Transparent

13.7 x 7.9 mm

$ 13.90

View Gem
6.38ct Multicolor Pietersite, Oval, Opaque

6.38ct Multicolor Pietersite, Oval, Opaque

14 x 9 mm (calibrated)

$ 15.44

View Gem
8.47ct Brown Star Moonstone, Oval, Translucent

8.47ct Brown Star Moonstone, Oval, Translucent

13.3 x 10 mm

$ 37.12

View Gem
3.67ctw Red Pyrope Garnet, Marquise, VVS-VS

3.67ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6.1 mm

$ 40.33

View Gem
104.71ct Violet Amethyst, Pear Shape, VVS
Amethyst Product Video (724431)

104.71ct Violet Amethyst, Pear Shape, VVS

33.5 x 33.3 mm

$ 784.27

View Gem
12.55ct Brown Tiger'S Eye, Baguette, Opaque

12.55ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 16.25

View Gem
0.80ct Green Peridot, Oval, VVS

0.80ct Green Peridot, Oval, VVS

7 x 5 mm (calibrated)

$ 11.16

View Gem
0.95ctw Yellow Citrine, Heart, VVS-VS

0.95ctw Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 7.57

View Gem
1.33ct Green Sphene, Oval, Transparent

1.33ct Green Sphene, Oval, Transparent

6.5 x 5.6 mm

$ 7.29

View Gem
1.41ct Orange Hessonite Garnet, Emerald Cut, VS

1.41ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 23.17

View Gem
24.82ct Multicolor Rainbow Pyrite, Fancy, Opaque

24.82ct Multicolor Rainbow Pyrite, Fancy, Opaque

29 x 14.9 mm

$ 74.16

View Gem
1.02ct Pink Tourmaline, Oval, Transparent

1.02ct Pink Tourmaline, Oval, Transparent

7.4 x 5.9 mm

$ 16.90

View Gem
0.44ct Yellow Citrine, Heart, VVS-VS

0.44ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 3.50

View Gem
11.03ct Green Prehnite, Fancy, Translucent

11.03ct Green Prehnite, Fancy, Translucent

16 x 12 mm (calibrated)

$ 18.12

View Gem
1 2 3
...
720
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

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
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

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image