Home » Minerals » Marcasite

Marcasite


Mineral Properties and Uses



What is Marcasite?



Marcasite is an iron sulfide mineral. It has the same chemical composition as pyrite, however these two minerals are in different crystal systems (marcasite is orthorhombic and pyrite is isometric).


Physical Properties of Marcasite

Chemical Classification sulfide
Color pale bronze yellow
Streak grayish black
Luster metallic
Diaphaneity opaque
Cleavage poor
Mohs Hardness 6 to 7.5
Specific Gravity 4.9
Diagnostic Properties color
Chemical Composition iron sulfide, FeS2
Crystal System orthorhombic
Uses


Uses of Marcasite?



Very few commercial uses. Has been used as a source of sulfur and as an ornamental stone (many of the ornamental stones sold under the name of "marcasite" are actually pyrite).




Find it on Geology.com




More from Geology.com


rocks
Rock Gallery: Photos of igneous, sedimentary and metamorphic rocks.
Opal
Pictures of Opal: A collection of different types of opal from all around the world and Mars too!
Minerals
Minerals: Information about ore minerals, gem materials and rock-forming minerals.
Geology gifts
Gifts that Rock! Find something for the rockhound on your holiday shopping list.
tourmaline
Tourmaline - the most colorful mineral and natural gem material on Earth.
Geologist Tools
Geologist Tools: Visit our store for a large selection of field and laboratory tools.
zoisite
Zoisite is a diverse gem. Tanzanite, thulite and anyolite are three of its gem varieties.
cinnabar
Cinnabar - the only important ore of mercury. Used as a pigment until its toxicity was realized.




More Minerals
  Topaz
  Gifts that Rock!
  Calcite
  Rock, Mineral and Fossil Collections.
  Quartz
  Minerals
  Fluorescent Minerals
  Diamond






© 2005-2017 Geology.com. All Rights Reserved.
Images, code, and content on this website are property of Geology.com and are protected by copyright law.
Geology.com does not grant permission for any use, republication, or redistribution.