Results 151 to 156 of about 267 (156)

Portable Instruments and Tips on Practical Gemology in the Field

Gems & Gemology, 2002
exaly  

descriptive gemology

2009
openaire   +1 more source

Contributions to A History of Gemology: Specific Gravity — Origins and Development of the Hydrostatic Method

Gems & Gemology, 1986
exaly  

determinative gemology

2009
exaly  

archaeological gemology

2009
exaly  

Pedagogical intervention using gemology in technical mining courses

exaly