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
1.54ct Pink Morganite, Oval, VVS

1.54ct Pink Morganite, Oval, VVS

8.5 x 6.5 mm

$ 134.97

View Gem
11.86ct Pink Kunzite, Emerald Cut, VS
Kunzite Product Video (695361)

11.86ct Pink Kunzite, Emerald Cut, VS

13.3 x 11.5 mm

$ 295.31

View Gem
1.17ct Pink Morganite, Round, VS

1.17ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 45.45

View Gem
6.03ct Red Almandine Garnet, Emerald Cut, VVS

6.03ct Red Almandine Garnet, Emerald Cut, VVS

12 x 8 mm (calibrated)

$ 210.21

View Gem
7.17ct Multicolor Agate, Oval, Opaque

7.17ct Multicolor Agate, Oval, Opaque

12 x 10 mm (calibrated)

$ 12.14

View Gem
0.97ctw Green Peridot, Oval, VS

0.97ctw Green Peridot, Oval, VS

6 x 4 mm (calibrated)

$ 10.62

View Gem
1.00ct Orange Hessonite Garnet, Oval, VS-SI

1.00ct Orange Hessonite Garnet, Oval, VS-SI

7 x 5 mm (calibrated)

$ 17.93

View Gem
1.84ctw Orange Hessonite Garnet, Square, VS
Hessonite Garnet Product Video (381262)

1.84ctw Orange Hessonite Garnet, Square, VS

3.8 x 3.7 mm

$ 39.14

View Gem
3.47ct Red Almandine Garnet, Oval, VVS-VS
Almandine Garnet Product Video (754770)

3.47ct Red Almandine Garnet, Oval, VVS-VS

9.8 x 7.5 mm

$ 100.80

View Gem
6.48ct Black Star Diopside, Oval, Opaque

6.48ct Black Star Diopside, Oval, Opaque

12 x 10 mm (calibrated)

$ 32.27

View Gem
0.20ctw White Diamond, Round, VVS-VS
Diamond Product Video (567406)

0.20ctw White Diamond, Round, VVS-VS

3 mm (calibrated)

$ 357.53

View Gem
6.51ctw Pink Strawberry Quartz, Oval, Transparent

6.51ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 48.82

View Gem
6.99ct Brown Smoky Quartz, Round, VVS

6.99ct Brown Smoky Quartz, Round, VVS

13 mm (calibrated)

$ 13.70

View Gem
0.86ct Green Peridot, Oval, VVS-VS

0.86ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 5.99

View Gem
4.11ct Violet Amethyst, Oval, Transparent

4.11ct Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 22.52

View Gem
7.85ct Multicolor Agate, Round, Opaque

7.85ct Multicolor Agate, Round, Opaque

11 mm (calibrated)

$ 6.26

View Gem
0.11ctw Black Diamond, Round, Opaque

0.11ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 31.96

View Gem
36.54ct Multicolor Moss Agate, Oval, Translucent
Moss Agate Product Video (742953)

36.54ct Multicolor Moss Agate, Oval, Translucent

35.4 x 24.3 mm

$ 30.33

View Gem
2.17ct Pink Tourmaline, Emerald Cut, VS

2.17ct Pink Tourmaline, Emerald Cut, VS

7.4 x 6.3 mm

$ 164.04

View Gem
0.91ct Green Peridot, Oval, VVS-VS

0.91ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 6.34

View Gem
1.55ct Orange Zircon, Round, VVS-VS

1.55ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 36.96

View Gem
1.72ct Pink Tourmaline, Oval, Transparent

1.72ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 68.52

View Gem
2.73ct Violet Amethyst, Trillion, VVS-VS

2.73ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.03

View Gem
2.98ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

2.98ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 58.76

View Gem
1 2 3
...
1654
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

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 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 -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

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