R. Keith Mitchell – författare
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2 produkter
Spectroscope and Gemmology
Av Basil Anderson, James Payne m. fl.
Inbunden, 2006
697 kr
Lägg i varukorg
The 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 …
