Orthoclase and Microcline Photos 
Cochise College               
Photos of Minerals
Geology Home Page

Roger Weller, geology instructor

[email protected]     copyright 2010-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.
 

orthoclase                                                                                                                                     116
Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.