Crystals of apatite of the first generation in pegmatite, from 

 Lyon Mountain, showing a wedge of orthoclase driven into the side 

 of the crystals by external force. The orthoclase fragment appears 

 as a heart-shaped spot near the upper edge of the specimen. Note 

 the bulging of the edge of the crystal around the fragment. The 

 scale is divided into centimeters. 



