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
0.99ct Orange Hessonite Garnet, Emerald Cut, VS

0.99ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 18.73

View Gem
1.04ct Yellow Citrine, Cushion, VVS-VS

1.04ct Yellow Citrine, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 7.77

View Gem
1.04ct Yellow Citrine, Emerald Cut, VVS-VS

1.04ct Yellow Citrine, Emerald Cut, VVS-VS

12 x 4.2 mm

$ 8.28

View Gem
0.48ct Orange Citrine, Marquise, VS

0.48ct Orange Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 3.34

View Gem
13.70ct Green Prehnite, Flower Cut, Translucent

13.70ct Green Prehnite, Flower Cut, Translucent

22.4 x 13.8 mm

$ 20.72

View Gem
9.33ct Multicolor Agate, Round, Opaque

9.33ct Multicolor Agate, Round, Opaque

12 mm (calibrated)

$ 13.16

View Gem
2.03ct Yellow Citrine, Trillion, VVS-VS

2.03ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 10.99

View Gem
36.65ct Multicolor Jasper, Oval, Opaque

36.65ct Multicolor Jasper, Oval, Opaque

27 x 20 mm (calibrated)

$ 22.48

View Gem
1.06ct Yellow Citrine, Square, VVS-VS

1.06ct Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 7.39

View Gem
2.06ct Multicolor Pietersite, Round, Opaque

2.06ct Multicolor Pietersite, Round, Opaque

8.5 mm (calibrated)

$ 4.99

View Gem
1.67ct Yellow Citrine, Round, VS

1.67ct Yellow Citrine, Round, VS

8 mm (calibrated)

$ 13.30

View Gem
1.95ctw Red Pyrope Garnet, Oval, VVS-VS

1.95ctw Red Pyrope Garnet, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 14.08

View Gem
3.48ct Multicolor Labradorite, Baguette, Translucent

3.48ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 4.78

View Gem
22.24ct Multicolor Jasper, Pear Shape, Opaque

22.24ct Multicolor Jasper, Pear Shape, Opaque

24.6 x 21.5 mm

$ 12.91

View Gem
4.94ctw Pink Strawberry Quartz, Oval, Transparent

4.94ctw Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 36.70

View Gem
58.53ct Multicolor Tiger'S Eye Matrix, Trillion, Opaque

58.53ct Multicolor Tiger'S Eye Matrix, Trillion, Opaque

34.3 x 32 mm

$ 26.24

View Gem
4.34ct Orange Sunstone, Oval, Translucent

4.34ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 25.83

View Gem
5.74ct Yellow Citrine, Oval, VVS-VS

5.74ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 34.47

View Gem
0.60ct Green Cat'S Eye Alexandrite, Oval, Opaque

0.60ct Green Cat'S Eye Alexandrite, Oval, Opaque

4.9 x 4.6 mm

$ 124.50

View Gem
1.18ct Yellow Citrine, Cushion, VS

1.18ct Yellow Citrine, Cushion, VS

8 x 6 mm (calibrated)

$ 8.81

View Gem
9.96ct Multicolor Labradorite, Marquise, Translucent

9.96ct Multicolor Labradorite, Marquise, Translucent

22.2 x 10.8 mm

$ 12.12

View Gem
21.86ct Brown Moonstone, Oval, Opaque

21.86ct Brown Moonstone, Oval, Opaque

20 x 15 mm (calibrated)

$ 35.92

View Gem
8.04ct Pink Rose Quartz, Flower Cut, Transparent/Translucent

8.04ct Pink Rose Quartz, Flower Cut, Transparent/Translucent

12.7 x 12.4 mm

$ 26.43

View Gem
2.05ct Orange Hessonite Garnet, Cushion, SI

2.05ct Orange Hessonite Garnet, Cushion, SI

7 x 7 mm (calibrated)

$ 34.93

View Gem
1 2 3
...
916
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

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 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 -> 10 star ratings

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

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