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
0.86ct Pink Tourmaline, Round, Transparent

0.86ct Pink Tourmaline, Round, Transparent

5.5 mm (calibrated)

$ 14.25

View Gem
30.95ct Multicolor Jasper, Oval, Opaque

30.95ct Multicolor Jasper, Oval, Opaque

34.3 x 18 mm

$ 17.97

View Gem
1.63ct Brown Kornerupine, Pear Shape, VVS

1.63ct Brown Kornerupine, Pear Shape, VVS

10 x 6 mm

$ 135.29

View Gem
1.22ctw Red Pyrope Garnet, Pear Shape, VVS-VS

1.22ctw Red Pyrope Garnet, Pear Shape, VVS-VS

7 x 4.7 mm

$ 9.72

View Gem
13.00ct Multicolor Agate, Oval, Opaque

13.00ct Multicolor Agate, Oval, Opaque

14.8 x 13.3 mm

$ 12.95

View Gem
4.49ct Yellow Citrine, Emerald Cut, VVS-VS

4.49ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 31.31

View Gem
0.61ct Orange Zircon, Oval, VVS

0.61ct Orange Zircon, Oval, VVS

5.1 x 4.1 mm

$ 9.11

View Gem
1.93ct Pink Kunzite, Cushion, VVS-VS

1.93ct Pink Kunzite, Cushion, VVS-VS

6.8 x 6.1 mm

$ 53.12

View Gem
6.10ct Pink Rose Quartz, Emerald Cut, Transparent

6.10ct Pink Rose Quartz, Emerald Cut, Transparent

11.6 x 11.4 mm

$ 33.42

View Gem
5.93ct Pink Strawberry Quartz, Round, Translucent

5.93ct Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 35.61

View Gem
1.36ct White Rainbow Moonstone, Oval, Transparent

1.36ct White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 25.33

View Gem
1.16ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.16ct Yellow Color-Change Diaspore, Cushion, VVS-VS

7.9 x 5.2 mm

$ 40.67

View Gem
56.91ct Multicolor Coral, Oval, Opaque
Coral Product Video (491473)

56.91ct Multicolor Coral, Oval, Opaque

43.4 x 32 mm

$ 83.56

View Gem
5.78ctw Violet Amethyst, Oval, Transparent

5.78ctw Violet Amethyst, Oval, Transparent

10 x 8 mm (calibrated)

$ 31.66

View Gem
17.80ct Multicolor Jasper, Fancy, Opaque

17.80ct Multicolor Jasper, Fancy, Opaque

23.7 x 21.1 mm

$ 10.72

View Gem
1.66ct Pink Tourmaline, Oval, VS
Tourmaline Product Video (525364)

1.66ct Pink Tourmaline, Oval, VS

6.7 x 6.5 mm

$ 254.62

View Gem
3.12ct Yellow Citrine, Oval, VVS

3.12ct Yellow Citrine, Oval, VVS

11.5 x 9.2 mm

$ 18.91

View Gem
1.79ct Red Almandine Garnet, Marquise, VVS
Almandine Garnet Product Video (743159)

1.79ct Red Almandine Garnet, Marquise, VVS

12 x 6 mm (calibrated)

$ 66.86

View Gem
1.66ct Orange Zircon, Round, VVS-VS

1.66ct Orange Zircon, Round, VVS-VS

7 mm (calibrated)

$ 32.84

View Gem
19.84ct White Howlite, Trillion, Opaque

19.84ct White Howlite, Trillion, Opaque

25.7 x 20.6 mm

$ 8.23

View Gem
4.22ctw Purple Rhodolite Garnet, Oval, VS

4.22ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 89.74

View Gem
0.26ct Violet Iolite, Emerald Cut, VS

0.26ct Violet Iolite, Emerald Cut, VS

5 x 3 mm (calibrated)

$ 10.36

View Gem
0.80ct Green Peridot, Oval, VVS

0.80ct Green Peridot, Oval, VVS

7 x 5 mm (calibrated)

$ 11.16

View Gem
4.68ct Yellow Rutile Quartz, Oval, Transparent

4.68ct Yellow Rutile Quartz, Oval, Transparent

13 x 9 mm (calibrated)

$ 12.82

View Gem
1 2 3
...
1763
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

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

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

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