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
46.28ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

46.28ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

36 x 19.9 mm

$ 21.21

View Gem
17.76ct Multicolor Jasper, Fancy, Opaque

17.76ct Multicolor Jasper, Fancy, Opaque

39.3 x 11.2 mm

$ 11.35

View Gem
3.43ct Pink Strawberry Quartz, Oval, Translucent

3.43ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 26.30

View Gem
24.61ct Black Snowflake Obsidian, Pear Shape, Opaque

24.61ct Black Snowflake Obsidian, Pear Shape, Opaque

25.4 x 21.8 mm

$ 14.46

View Gem
2.21ctw Multicolor Andalusite, Oval, VS

2.21ctw Multicolor Andalusite, Oval, VS

5 x 3 mm (calibrated)

$ 118.07

View Gem
5.90ctw Brown Smoky Quartz, Marquise, VVS

5.90ctw Brown Smoky Quartz, Marquise, VVS

18.1 x 7.1 mm

$ 35.26

View Gem
3.11ct Yellow Citrine, Oval, VVS-VS

3.11ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 20.45

View Gem
2.01ct Red Almandine Garnet, Oval, VVS-VS

2.01ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 75.07

View Gem
2.42ctw Red Pyrope Garnet, Marquise, VVS-VS

2.42ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5 mm

$ 21.21

View Gem
1.08ctw Green Peridot, Oval, Transparent

1.08ctw Green Peridot, Oval, Transparent

6.1 x 4.2 mm

$ 19.36

View Gem
1.20ct Purple Spinel, Cushion, VS

1.20ct Purple Spinel, Cushion, VS

6.3 x 5.4 mm

$ 143.42

View Gem
6.65ct Multicolor Agate, Oval, Opaque

6.65ct Multicolor Agate, Oval, Opaque

12.2 x 10.5 mm

$ 5.30

View Gem
2.81ctw Orange Sunstone, Oval, Translucent

2.81ctw Orange Sunstone, Oval, Translucent

7 x 5 mm (calibrated)

$ 16.10

View Gem
1.54ctw Green Demantoid Garnet, Oval, VS

1.54ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 168.72

View Gem
26.73ct Green Aventurine, Fancy, Opaque

26.73ct Green Aventurine, Fancy, Opaque

33.1 x 10.1 mm

$ 2.22

View Gem
2.30ctw Pink Strawberry Quartz, Oval, Translucent

2.30ctw Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 11.71

View Gem
12.27ct Brown Tiger'S Eye, Baguette, Opaque

12.27ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 12.22

View Gem
12.15ct Blue Color-Change Fluorite, Round, VS

12.15ct Blue Color-Change Fluorite, Round, VS

14 mm (calibrated)

$ 333.85

View Gem
22.15ct Brown Moonstone, Oval, Opaque

22.15ct Brown Moonstone, Oval, Opaque

22.1 x 16.2 mm

$ 44.12

View Gem
23.49ct Multicolor Jasper, Oval, Opaque

23.49ct Multicolor Jasper, Oval, Opaque

30 x 19.5 mm

$ 19.31

View Gem
1.33ctw Blue Kyanite, Round, SI

1.33ctw Blue Kyanite, Round, SI

5.2 mm

$ 33.12

View Gem
22.75ct Brown Moonstone, Oval, Opaque

22.75ct Brown Moonstone, Oval, Opaque

20 x 15 mm (calibrated)

$ 49.85

View Gem
1.05ct Orange Zircon, Oval, VS

1.05ct Orange Zircon, Oval, VS

5.9 x 4.9 mm

$ 15.69

View Gem
2.50ctw Multicolor Opal, Oval, Translucent

2.50ctw Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 71.50

View Gem
1 2 3
...
822
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 -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate

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

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image