ELECTRONIC	w   w   w dot h a n d b o o k o f m i n e r a l o g y dot o r g   s l a s h   p   d   f   s   s l a s h   s t i l b i t e c a dot p d f k l e i n	www.handbookofmineralogy.org/pdfs/stilbiteca.pdfklein	1