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
2.57ctw Multicolor Andalusite, Round, VS
Andalusite Product Video (279593)

2.57ctw Multicolor Andalusite, Round, VS

4 mm (calibrated)

$ 126.71

View Gem
0.68ct Green Peridot, Oval, VVS-VS

0.68ct Green Peridot, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 12.19

View Gem
0.63ct Red Spinel, Cushion, VS

0.63ct Red Spinel, Cushion, VS

4.9 x 4.7 mm

$ 43.92

View Gem
20.91ct Multicolor Agate, Oval, Opaque

20.91ct Multicolor Agate, Oval, Opaque

19 x 14.9 mm

$ 16.67

View Gem
1.35ct Green Tourmaline, Emerald Cut, VVS-VS

1.35ct Green Tourmaline, Emerald Cut, VVS-VS

16.3 x 3.4 mm

$ 32.54

View Gem
40.12ct Brown Tiger'S Eye Matrix, Pear Shape, Opaque

40.12ct Brown Tiger'S Eye Matrix, Pear Shape, Opaque

30.4 x 23.4 mm

$ 39.96

View Gem
0.18ct Pink Morganite, Round, VS

0.18ct Pink Morganite, Round, VS

3.7 mm

$ 7.47

View Gem
0.05ct Black Diamond, Round, Opaque

0.05ct Black Diamond, Round, Opaque

2.3 mm (calibrated)

$ 16.28

View Gem
12.46ct Yellow Rutile Quartz, Round, Translucent

12.46ct Yellow Rutile Quartz, Round, Translucent

15 mm (calibrated)

$ 33.86

View Gem
4.64ct Pink Kunzite, Emerald Cut, VVS-VS
Kunzite Product Video (695212)

4.64ct Pink Kunzite, Emerald Cut, VVS-VS

12.5 x 6.9 mm

$ 115.54

View Gem
2.77ct Turquoise Fluorite, Pear Shape, Transparent

2.77ct Turquoise Fluorite, Pear Shape, Transparent

9 x 7 mm (calibrated)

$ 11.04

View Gem
13.86ct Multicolor Labradorite, Trillion, Translucent

13.86ct Multicolor Labradorite, Trillion, Translucent

18 x 18 mm (calibrated)

$ 30.64

View Gem
5.35ct Pink Rose Quartz, Emerald Cut, Transparent

5.35ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 29.32

View Gem
46.64ct Multicolor Jasper, Oval, Opaque

46.64ct Multicolor Jasper, Oval, Opaque

33.6 x 25.1 mm

$ 26.48

View Gem
0.60ct Orange Citrine, Oval, VVS-VS

0.60ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 5.98

View Gem
0.82ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.82ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6.6 x 4.5 mm

$ 26.10

View Gem
0.83ct Green Peridot, Oval, VS

0.83ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.79

View Gem
0.90ct Green Chrome Diopside, Oval, VS

0.90ct Green Chrome Diopside, Oval, VS

7 x 5 mm (calibrated)

$ 22.41

View Gem
1.00ct Pink Tourmaline, Round, Transparent

1.00ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 39.84

View Gem
0.68ct Blue Kyanite, Round, SI

0.68ct Blue Kyanite, Round, SI

5.3 mm

$ 16.93

View Gem
1.25ctw Yellow Citrine, Pear Shape, VVS

1.25ctw Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 9.96

View Gem
1.30ctw Violet Amethyst, Emerald Cut, VS

1.30ctw Violet Amethyst, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 7.55

View Gem
3.33ct Multicolor Opal, Oval, Transparent

3.33ct Multicolor Opal, Oval, Transparent

14.2 x 9.6 mm

$ 82.92

View Gem
12.87ct Multicolor Jasper, Oval, Opaque

12.87ct Multicolor Jasper, Oval, Opaque

20 x 15 mm (calibrated)

$ 21.15

View Gem
1 2 3
...
1461
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

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
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

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

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
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image