Definitions for "Petrography"
The scientific description of rocks; that department of science which investigates the constitution of rocks; petrology.
The branch of petrology dealing with the description and systematic classification of rocks aside from their geologic relations. Classification is achieved mainly by chemical and microscopical laboratory testing. Term is also used loosely for petrology.
Petrography - The study of rocks based on microscopic analysis of thin sections.
Keywords:  stone, writing, art
The art of writing on stone.