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
63.42ct Multicolor Rhodonite, Fancy, Opaque
Rhodonite Product Video (690743)

63.42ct Multicolor Rhodonite, Fancy, Opaque

25.7 x 22.9 mm

$ 58.12

View Gem
2.19ct Orange Hessonite Garnet, Oval, VS-SI

2.19ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 65.00

View Gem
1.19ct Pink Malaya Garnet, Round, VS

1.19ct Pink Malaya Garnet, Round, VS

6 mm (calibrated)

$ 55.42

View Gem
12.19ct Orange Sphalerite, Oval, SI-I1
Sphalerite Product Video (690767)

12.19ct Orange Sphalerite, Oval, SI-I1

14.9 x 11.6 mm

$ 607.06

View Gem
2.38ct Green Peridot, Cushion, VS

2.38ct Green Peridot, Cushion, VS

9.5 x 7 mm

$ 93.87

View Gem
11.83ct Blue Chalcedony, Pear Shape, Opaque

11.83ct Blue Chalcedony, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 29.47

View Gem
1.62ct Orange Hessonite Garnet, Emerald Cut, SI

1.62ct Orange Hessonite Garnet, Emerald Cut, SI

7.5 x 5.8 mm

$ 22.71

View Gem
40.89ct Multicolor Labradorite, Pear Shape, Opaque

40.89ct Multicolor Labradorite, Pear Shape, Opaque

29.1 x 24.6 mm

$ 44.80

View Gem
1.73ct Pink Morganite, Round, VVS-VS

1.73ct Pink Morganite, Round, VVS-VS

7.5 mm (calibrated)

$ 132.68

View Gem
3.36ct Orange Sphalerite, Emerald Cut, SI
Sphalerite Product Video (690772)

3.36ct Orange Sphalerite, Emerald Cut, SI

9.3 x 6.5 mm

$ 167.33

View Gem
11.75ct Pink Rose Quartz, Emerald Cut, Transparent

11.75ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 64.37

View Gem
34.00ct Green Maw-Sit-Sit, Round, Opaque
Maw-Sit-Sit Product Video (476802)

34.00ct Green Maw-Sit-Sit, Round, Opaque

19 mm (calibrated)

$ 101.59

View Gem
14.24ct Black Tourmaline, Pear Shape, Opaque

14.24ct Black Tourmaline, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 59.10

View Gem
2.03ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (461509)

2.03ctw Green Demantoid Garnet, Oval, VS

4.8 x 4.1 mm

$ 185.34

View Gem
20.93ct Green Maw-Sit-Sit, Square, Opaque

20.93ct Green Maw-Sit-Sit, Square, Opaque

16 x 16 mm (calibrated)

$ 68.79

View Gem
66.88ct Multicolor Jasper, Baguette, Opaque
Jasper Product Video (447424)

66.88ct Multicolor Jasper, Baguette, Opaque

31.7 x 25.4 mm

$ 53.29

View Gem
0.64ct Multicolor Chocolate Opal, Round, Translucent

0.64ct Multicolor Chocolate Opal, Round, Translucent

6 mm (calibrated)

$ 17.53

View Gem
20.07ct Multicolor Jasper, Oval, Opaque

20.07ct Multicolor Jasper, Oval, Opaque

29.2 x 18.5 mm

$ 32.98

View Gem
3.64ct Yellow Prehnite, Oval, Transparent/Translucent

3.64ct Yellow Prehnite, Oval, Transparent/Translucent

10 x 8 mm (calibrated)

$ 28.45

View Gem
1.33ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458407)

1.33ctw Green Demantoid Garnet, Oval, VS

4.4 x 3.5 mm

$ 121.43

View Gem
21.82ct Multicolor Boulder Opal, Cushion, Opaque
Boulder Opal Product Video (627639)

21.82ct Multicolor Boulder Opal, Cushion, Opaque

20.7 x 16.1 mm

$ 167.34

View Gem
35.68ct Black Snowflake Obsidian, Fancy, Opaque

35.68ct Black Snowflake Obsidian, Fancy, Opaque

26.4 x 24.5 mm

$ 20.97

View Gem
6.35ct Brown Smoky Quartz, Marquise, VVS

6.35ct Brown Smoky Quartz, Marquise, VVS

25.3 x 9.1 mm

$ 44.27

View Gem
39.86ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

39.86ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

21 x 19.4 mm

$ 23.02

View Gem
1 2 3
...
32
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

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
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

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

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