Quartz crystal #2

Description

This α [quartz](http://webmineral.com/data/Quartz.shtml) (SiO₂) crystal shows most of the diagnotic visual properties of quartz at a crystal level. The crystal is six-sided (two trigonal prisms), has a pyramidal termination at the top, is pale coloured and transluscent, and has the typical striations perpendicular to the Z-axis (or C-axis) on the prism faces.