Rhodochrosite
Colorado's State Mineral

MnCO₃

Rhodochrosite is at the top of the list when you think of Colorado minerals. It is the Colorado state mineral. The most beautiful specimens in the world come from the Sweet Home Mine that is located in Alma, Colorado. Now closed, this mine produced large beautiful specimens for about 10 years in the 1990’s. While specimens from the Sweet Home are still available, they are increasingly rare and the price continues to rise. For the collector of minerals, the price is well worth it for the Colorado beauties.

Colorado Rhodochrosite
Colorado "rhodo" is the bright red, crystal clear variety unlike all but one other rhodo location in the world. Interestingly, the other location for this sort of clear cherry red crystal is the Pasto Bueno mining district, located in Peru. Like the Sweet Home Mine this district is at timberline, but is a continent away.

A Description Rhodochrosite is a manganese carbonate mineral. Its chemical composition is MnCO₃. In its purest form it is a transparent rose red, but this is fairly rare. It can also be formed in stalactites. This form can be sliced revealing circular layers of rose and pink to milky white. These lighter colors are formed when the manganese is replaced by calcium, manganese or zinc. The depth of color from red to pink depends on the amount of substitution.

The Details
This mineral has a Mohs harness scale between 3.5 and 4 and its streak is white. Its crystal formation is rhombohedral, meaning it is like a cube, but “squished” to form and equal-sided parallogram or rhombus shape on its sides. It cleaves perfectly along each of the three planes that form the rhombohedral shape.

Formation
Rhodochrosite is formed in hydrothermal veins in low temperature ore deposits.

Uses
This mineral is prized by mineral collectors. It is also popular in jewelry.

Metaphysical Properties
For the metaphysician This mineral attracts love to the wearer, has a positive effect on eyesight, and helps in letting go of psychological baggage.

Mineral Properties

Chemical formula: MnCO₃
Color(s): Red to pink, white and brown
Streak: White
Luster: vitreous
Transparency: Transparent to opaque
Crystal system: rhombohedral
Specific Gravity: 3.6
Hardness (Mohs): 3.5 to 4
Cleavage: perfect
Fracture: conchoidal to uneven
Uses: Mineral Specimens, jewelry and ornamentals
Location: Colorado in the USA, Kuruman, South Africa; Romania, Peru, Argentina

Rhodochrosite for Sale

Back to The Mineral Gallery

Rock and Mineral Collections

Fossil and Geologic Time Book Sets

Fossil Collections

Share this page:

What’s this?

Facebook Twitter

Enjoy this page? Please pay it forward. Here's how...

Would you prefer to share this page with others by linking to it?

Click on the HTML link code below.
Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment, your Facebook account, or anywhere that someone would find this page valuable.