Feldspar Photos  
Cochise College               
Photos of Minerals
Geology Home Page

Roger Weller, geology instructor

wellerr@cochise.edu     copyright 2016-R.Weller

orthoclase-Carlsbad twinned crystal-2
     A twin crystal is a structure where two or more crystals of the same mineral are
growing together, oriented in a specific crystallographic direction.  This particular
type of orthoclase feldspar twinning is referred to as a Carlsbad twin. 
The specimen is a little under 4 centimeters in length.


Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.