Viewed through a microscope, some gemstones and crystal specimens reveal amazing photogenic inclusions and surface features that could well be mistaken for abst

Ross Honsberger was born in Toronto, Canada, in 1929 and attended the University of Toronto. After more than a decade of teaching mathematics in Toronto, he too

Lists the birthstones for each month of the year and examines the physical appearance, spiritual character, and therapeutic and healing properties of each