Gems and Minerals:
Ref 1
Pellant, Chris, Pellant, Hellen; Smithsonian Handbooks Rocks And Minerals Dorling Kindersley
Limted, London, 2002 ISBN 978-0-7894-9106-0
Ref 2
Schumann, Walter, Handbook of Rocks, Minerals, and Gemstones, HarperCollins Publishers and
Houghton Mifflin Company, NewYork New York, 1985 ISBN - 0-395-51137-2
Ref 3
Mella, Dorothee, Stone Power, Warner Books Inc, New York NY, January 1988, ISBN 0-446-38696-0
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1 comment:
great article, in my old age I am beginning to like pink more and more
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