X
Gemstone Search
90,000+ Happy Customers
20+ Years In Business
Call Us Mon–Fri 8am–5pm

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

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
2.78ct Brown Rutile Quartz, Round, Transparent

2.78ct Brown Rutile Quartz, Round, Transparent

9 mm (calibrated)

$ 9.13

View Gem
1.41ct Yellow Beryl, Trillion, VVS

1.41ct Yellow Beryl, Trillion, VVS

8.4 x 8 mm

$ 30.89

View Gem
88.93ct Multicolor Jasper, Cushion, Opaque
Jasper Product Video (697207)

88.93ct Multicolor Jasper, Cushion, Opaque

39.8 x 35.4 mm

$ 50.49

View Gem
2.32ct Orange Sunstone, Round, Translucent

2.32ct Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 13.73

View Gem
81.64ctw Multicolor Rhodochrosite, Sphere / Ball, Opaque

81.64ctw Multicolor Rhodochrosite, Sphere / Ball, Opaque

16.3 mm

$ 178.89

View Gem
1.03ct Green Tourmaline, Fancy, VS

1.03ct Green Tourmaline, Fancy, VS

8 x 6 mm (calibrated)

$ 68.39

View Gem
2.37ctw Yellow Citrine, Round, VVS-VS

2.37ctw Yellow Citrine, Round, VVS-VS

7 mm (calibrated)

$ 16.53

View Gem
7.04ctw White Moonstone, Round, Translucent

7.04ctw White Moonstone, Round, Translucent

9 mm (calibrated)

$ 19.17

View Gem
9.78ct Multicolor Rainbow Pyrite, Fancy, Opaque

9.78ct Multicolor Rainbow Pyrite, Fancy, Opaque

19.2 x 13.6 mm

$ 29.22

View Gem
4.18ct Yellow Apatite, Oval, VS

4.18ct Yellow Apatite, Oval, VS

11 x 9 mm (calibrated)

$ 137.39

View Gem
14.04ctw Violet Amethyst, Oval, Transparent

14.04ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 64.09

View Gem
1.11ct Green Tourmaline, Emerald Cut, VVS

1.11ct Green Tourmaline, Emerald Cut, VVS

16.3 x 2.9 mm

$ 30.41

View Gem
8.38ct Brown Smoky Quartz, Round, VVS-VS

8.38ct Brown Smoky Quartz, Round, VVS-VS

14 mm (calibrated)

$ 13.78

View Gem
11.61ct Yellow Citrine, Oval, VVS

11.61ct Yellow Citrine, Oval, VVS

18 x 13 mm (calibrated)

$ 67.45

View Gem
1.93ct Pink Tourmaline, Round, VVS-VS
Tourmaline Product Video (744410)

1.93ct Pink Tourmaline, Round, VVS-VS

8 mm (calibrated)

$ 224.27

View Gem
1.77ct Orange Hessonite Garnet, Oval, VS

1.77ct Orange Hessonite Garnet, Oval, VS

8 x 6.7 mm

$ 35.26

View Gem
25.37ctw Multicolor Fossil Coral, Oval, Opaque

25.37ctw Multicolor Fossil Coral, Oval, Opaque

20.7 x 13.2 mm

$ 55.59

View Gem
0.89ct Yellow Beryl, Trillion, VVS-VS

0.89ct Yellow Beryl, Trillion, VVS-VS

7.8 x 7.6 mm

$ 17.73

View Gem
2.82ctw Green Peridot, Round, VVS-VS

2.82ctw Green Peridot, Round, VVS-VS

5 mm (calibrated)

$ 42.13

View Gem
35.91ct Multicolor Jasper, Pear Shape, Opaque

35.91ct Multicolor Jasper, Pear Shape, Opaque

28.9 x 23.8 mm

$ 25.18

View Gem
42.95ct Multicolor Jasper, Pear Shape, Opaque

42.95ct Multicolor Jasper, Pear Shape, Opaque

46 x 28.4 mm

$ 36.24

View Gem
1.71ct Blue Kyanite, Oval, SI

1.71ct Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 34.06

View Gem
12.80ct Brown Smoky Quartz, Emerald Cut, VVS

12.80ct Brown Smoky Quartz, Emerald Cut, VVS

16 x 16 mm (calibrated)

$ 53.70

View Gem
2.05ct Green Peridot, Cushion, VS

2.05ct Green Peridot, Cushion, VS

7.9 x 7.1 mm

$ 73.39

View Gem
1 2 3
...
369
Choose Page
1 - 1895

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

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image