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
1.62ct Orange Zircon, Emerald Cut, VS
Zircon Product Video (430496)

1.62ct Orange Zircon, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 44.37

View Gem
3.02ct Pink Kunzite, Emerald Cut, VVS-VS

3.02ct Pink Kunzite, Emerald Cut, VVS-VS

8.5 x 6.6 mm

$ 75.20

View Gem
2.54ct Multicolor Labradorite, Marquise, Translucent

2.54ct Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 5.62

View Gem
2.82ctw Red Pyrope Garnet, Marquise, VVS-VS

2.82ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.1 mm

$ 24.72

View Gem
21.29ct Blue Turquoise, Oval, Opaque

21.29ct Blue Turquoise, Oval, Opaque

22.7 x 15.4 mm

$ 64.04

View Gem
7.63ct Brown Smoky Quartz, Emerald Cut, VS

7.63ct Brown Smoky Quartz, Emerald Cut, VS

12 x 12 mm (calibrated)

$ 19.01

View Gem
1.04ct Orange Spessartite Garnet, Oval, VS-SI

1.04ct Orange Spessartite Garnet, Oval, VS-SI

7.3 x 5.7 mm

$ 250.33

View Gem
17.09ct Pink Kunzite, Pear Shape, VVS-VS
Kunzite Product Video (438129)

17.09ct Pink Kunzite, Pear Shape, VVS-VS

23.9 x 10.9 mm

$ 340.43

View Gem
1.64ct Green Sphene, Oval, Transparent

1.64ct Green Sphene, Oval, Transparent

6.7 x 6.2 mm

$ 8.17

View Gem
1.15ctw Green Peridot, Marquise, VVS-VS

1.15ctw Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 9.16

View Gem
29.71ctw Multicolor Fossil Coral, Fancy, Opaque

29.71ctw Multicolor Fossil Coral, Fancy, Opaque

22.9 x 11.8 mm

$ 38.41

View Gem
13.63ct Black Obsidian, Oval, Opaque

13.63ct Black Obsidian, Oval, Opaque

24.8 x 15.8 mm

$ 10.18

View Gem
5.53ct Pink Rose Quartz, Round, Transparent

5.53ct Pink Rose Quartz, Round, Transparent

12 mm (calibrated)

$ 18.33

View Gem
3.44ct Yellow Citrine, Square, VVS-VS

3.44ct Yellow Citrine, Square, VVS-VS

9 x 9 mm (calibrated)

$ 26.39

View Gem
113.09ct Multicolor Chrysocolla, Cushion, Opaque
Chrysocolla Product Video (658621)

113.09ct Multicolor Chrysocolla, Cushion, Opaque

49.6 x 33.9 mm

$ 192.61

View Gem
2.98ct Pink Tourmaline, Emerald Cut, VVS-VS

2.98ct Pink Tourmaline, Emerald Cut, VVS-VS

8.9 x 6.5 mm

$ 225.28

View Gem
1.37ct Purple Spinel, Cushion, VVS-VS

1.37ct Purple Spinel, Cushion, VVS-VS

7.5 x 6.4 mm

$ 136.45

View Gem
11.46ct Multicolor Agate, Oval, Opaque

11.46ct Multicolor Agate, Oval, Opaque

18.7 x 12.9 mm

$ 18.14

View Gem
12.21ct Pink Rose Quartz, Emerald Cut, Transparent

12.21ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 66.89

View Gem
1.86ct Yellow Citrine, Round, VVS

1.86ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.96

View Gem
13.00ct White Rainbow Moonstone, Pear Shape, Translucent

13.00ct White Rainbow Moonstone, Pear Shape, Translucent

18.7 x 14.3 mm

$ 90.64

View Gem
29.31ct Multicolor Jasper, Oval, Opaque

29.31ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 33.72

View Gem
4.64ct Yellow Citrine, Emerald Cut, VVS-VS

4.64ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 35.59

View Gem
85.53ct Multicolor Ruby-Zoisite, Oval, Opaque
Ruby-Zoisite Product Video (484096)

85.53ct Multicolor Ruby-Zoisite, Oval, Opaque

38.2 x 30.3 mm

$ 140.57

View Gem
1 2 3
...
122
Choose Page
1 - 1897

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

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

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