This book contains classic material dating back to the 1900s and before.
The content has been carefully selected for its interest and relevance
to a modern audience. Carefully selecting the best articles from our
collection we have compiled a series of historical and informative
publications on the subjects of gemology and crystallography. The titles
in this range include Gemstone Manufacturing The Optical Properties of
Gemstones and Crystals The Thirty-Two Classes of Crystal Symmetry and
many more. Each publication has been professionally curated and includes
all details on the original source material. This particular instalment,
Optically Biaxial Crystals contains information on their structure,
properties and much more. Intended to illustrate the main features of
optically biaxial crystals it is a comprehensive guide for anyone
wishing to obtain a general knowledge of the subject and to understand
the field in its historical context. We are republishing these classic
works in affordable, high quality, modern editions, using the original
text and artwork.