Home » Minerals » Arsenopyrite


Mineral Properties and Uses

What is Arsenopyrite?

Arsenopyrite is an iron arsenic sulfide. It is the most common arsenic mineral and the primary ore of arsenic metal. Arsenopyrite is most often found as a hydrothermal vein mineral and sometimes as a mineral of contact metamorphism. It is sometimes referred to in old texts as "mispickel".

Physical Properties of Arsenopyrite

Chemical Classification sulfide
Color silver white to steel gray
Streak dark grayish black
Luster metallic
Diaphaneity opaque
Cleavage poor
Mohs Hardness 5.5 to 6
Specific Gravity 5.9 to 6.2
Diagnostic Properties smells like garlic when crushed, crystal form
Chemical Composition iron arsenic sulfide, FeAsS
Crystal System monoclinic
Uses poison, preservative, pigment

Find it on Geology.com

More from Geology.com

gem photos
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Geologist Tools
Geologist Tools: Visit our store for a large selection of field and laboratory tools.
tumbled stones
Tumbled Stones are rocks that have been rounded, smoothed and polished in a rock tumbler.
Sliding Rocks
Sliding Rocks Mystery: What causes these rocks to slide across a Death Valley playa?
wall maps
Wall Maps - World maps, United States maps, continent maps, maps of individual states.
Organic Gems
Organic Gems are gems formed from or by plants or animals. They might also be fossils.
Blue Gemstones
Blue Gemstones - Most people shopping for a colored stone are looking for something blue.
Azurmalachite is a mixture of malachite and azurite. It can be a beautiful blue and green gem.

Arsenopyrite from Gold Hill, Utah. Specimen is approximately 4 inches (10 centimeters) across.

More Minerals
  Mohs Hardness Scale
  Geology Tools
  Rock, Mineral and Fossil Collections.
  Mineral Identification Chart

© 2005-2016 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.
Images, code and content owned by others are marked on the pages where they appear.