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Doug is also an artist and a filmmaker and his online gallery can be seen at DougGiles
ISBN13: 9781947817142
ISBN10: 0393303756
I'm not the kind of guy a girl like her takes home
The Spectroscope and Gemmology Graeme Carlé Doug is also an artistThe first book devoted exclusively to the spectroscope and its use in gemstone identification. Until 1933 the refractometer and the microscope were the two principal tools in gem testing. Then B. W. Anderson introduced the hand spectroscope which quickly became the third vital instrument for the UK gemmologist. The publication of Anderson's papers in the mid 1950s alerted gem laboratories worldwide to the importance of this instrument. Today its use
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