Feature Gems & Gemology, Fall 1982, Vol. 18, No. 3

New Synthetic Rubies Made by Professor P. O. Knischka

A new synthetic ruby, developed by Professor P. O. Knischka using a method of gradient technique (not yet disclosed) through supercooling and saturation, has distinct crystallographic and gemological characteristics. Particularly notable are the great number of faces on the finished crystals and the identifying inclusions.