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

14.55ct White Rainbow Moonstone, Pear Shape, Transparent

20 x 15 mm (calibrated)

$ 115.93

View Gem

1.06ct Green Tourmaline, Emerald Cut, VVS-VS

12.3 x 3.2 mm

$ 52.79

View Gem

2.69ctw Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 53.05

View Gem

8.04ct Green Druzy Variscite, Fancy, Opaque

26.9 x 13.5 mm

$ 8.25

View Gem

5.95ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 9.88

View Gem

4.72ctw Multicolor Labradorite, Round, Translucent

8 mm (calibrated)

$ 5.59

View Gem

1.33ctw Orange Spessartite Garnet, Oval, VS-SI

5.1 x 4.2 mm

$ 46.36

View Gem

14.37ct Multicolor Labradorite, Round, Translucent

16 mm (calibrated)

$ 17.17

View Gem

13.56ctw Green Prehnite, Fancy, Transparent

16 x 12 mm (calibrated)

$ 21.25

View Gem

0.75ct Yellow Citrine, Heart, VVS

6 x 6 mm (calibrated)

$ 5.98

View Gem

1.34ct Yellow Beryl, Oval, VS

8.7 x 6.7 mm

$ 26.69

View Gem

1.78ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 13.65

View Gem

1.09ct Orange Zircon, Oval, VVS-VS

6 x 4.9 mm

$ 16.28

View Gem

1.60ct Pink Tourmaline, Round, Transparent

7 mm (calibrated)

$ 27.43

View Gem

3.68ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 29.32

View Gem

1.09ct Pink Morganite, Round, VS

6.5 mm (calibrated)

$ 95.53

View Gem

0.76ct Yellow Color-Change Diaspore, Cushion, VS

5.4 x 5.2 mm

$ 24.98

View Gem

6.04ct Yellow Rutile Quartz, Pear Shape, Transparent

15.2 x 11 mm

$ 14.92

View Gem

0.39ct Blue Kyanite, Round, SI

4.5 mm (calibrated)

$ 9.71

View Gem

10.08ct Pink Rose Quartz, Emerald Cut, Transparent

12.5 x 12.5 mm

$ 55.22

View Gem

6.73ct Green Tsavorite Garnet, Pear Shape, Translucent

13 x 10 mm

$ 147.47

View Gem

6.95ct Yellow Citrine, Round, VVS-VS

12 mm (calibrated)

$ 53.30

View Gem

55.64ct Black Tourmaline, Cushion, Opaque

22.3 x 21.2 mm

$ 197.84

View Gem

2.55ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 17.72

View Gem
1 2 3
...
812
Choose Page
1 - 1897

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

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate
Enlarged Gemstone Image