Results 241 to 250 of about 712 (251)

treated gemstones

2009
openaire   +1 more source

A New Gemstone

The Journal of Gemmology, 1952
openaire   +1 more source

coated gemstones

2009
openaire   +1 more source

Gemstones

Kurt Nassau
exaly  

Bohemian gemstones

2009
openaire   +1 more source

Gemstone Constants

1983
openaire   +1 more source

Gemstone Identification

2003
openaire   +1 more source

measurement of gemstones

2009
openaire   +1 more source

nomenclature of gemstone

2009
openaire   +1 more source

Overview of Gemstones

openaire   +1 more source