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
11.88ct Green Bloodstone, Oval, Opaque

11.88ct Green Bloodstone, Oval, Opaque

16.1 x 14 mm

$ 5.09

View Gem
1.13ctw Orange Citrine, Oval, VS

1.13ctw Orange Citrine, Oval, VS

7 x 5 mm (calibrated)

$ 11.25

View Gem
3.84ct Brown Tiger'S Eye, Oval, Opaque

3.84ct Brown Tiger'S Eye, Oval, Opaque

12 x 8 mm (calibrated)

$ 3.83

View Gem
3.54ctw Red Pyrope Garnet, Square, VVS-VS

3.54ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 27.15

View Gem
24.87ct Multicolor Obsidian, Oval, Opaque

24.87ct Multicolor Obsidian, Oval, Opaque

30.3 x 23.1 mm

$ 20.98

View Gem
11.56ct Brown Tiger'S Eye, Baguette, Opaque

11.56ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 14.97

View Gem
6.34ct Pink Rose Quartz, Emerald Cut, Transparent

6.34ct Pink Rose Quartz, Emerald Cut, Transparent

11.5 x 11.4 mm

$ 34.73

View Gem
2.65ctw Pink Strawberry Quartz, Round, Translucent

2.65ctw Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 26.58

View Gem
30.15ct Violet Charoite, Fancy, Opaque
Charoite Product Video (343633)

30.15ct Violet Charoite, Fancy, Opaque

42.7 x 15.2 mm

$ 49.55

View Gem
11.91ctw Green Amazonite, Round, Opaque

11.91ctw Green Amazonite, Round, Opaque

9 mm (calibrated)

$ 24.25

View Gem
2.55ct White Rainbow Moonstone, Emerald Cut, VVS-VS
Rainbow Moonstone Product Video (741098)

2.55ct White Rainbow Moonstone, Emerald Cut, VVS-VS

8.1 x 6.9 mm

$ 266.21

View Gem
1.59ct Orange Zircon, Round, VVS-VS

1.59ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 34.84

View Gem
11.76ct White Rainbow Moonstone, Pear Shape, Transparent

11.76ct White Rainbow Moonstone, Pear Shape, Transparent

22.8 x 12.8 mm

$ 93.71

View Gem
0.36ct Pink Morganite, Oval, VS-SI

0.36ct Pink Morganite, Oval, VS-SI

5.9 x 4.3 mm

$ 14.94

View Gem
1.60ctw Yellow Citrine, Trillion, VVS-VS

1.60ctw Yellow Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 12.75

View Gem
5.21ct Yellow Rutile Quartz, Oval, Transparent

5.21ct Yellow Rutile Quartz, Oval, Transparent

14.3 x 10.3 mm

$ 14.26

View Gem
0.64ct Orange Spessartite Garnet, Oval, VS

0.64ct Orange Spessartite Garnet, Oval, VS

6 x 4 mm (calibrated)

$ 22.31

View Gem
0.65ct Violet Amethyst, Marquise, VVS

0.65ct Violet Amethyst, Marquise, VVS

8.2 x 4.2 mm

$ 4.32

View Gem
0.02ct Black Diamond, Round, Opaque

0.02ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 15.94

View Gem
4.36ct Black Star Diopside, Oval, Opaque

4.36ct Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 18.09

View Gem
1.74ct Orange Hessonite Garnet, Cushion, VS

1.74ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 28.19

View Gem
5.51ct Brown Smoky Quartz, Round, Transparent

5.51ct Brown Smoky Quartz, Round, Transparent

12 mm (calibrated)

$ 23.12

View Gem
2.51ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (387698)

2.51ctw Green Demantoid Garnet, Oval, VS

4.2 x 3.3 mm

$ 185.02

View Gem
0.15ctw White Diamond, Round, VVS-VS

0.15ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 268.16

View Gem
1 2 3
...
206
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

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

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

Very good

Posted By Niska in August, 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

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

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