Results 261 to 270 of about 10,184 (280)

fabricated gemstones

2009
openaire   +1 more source

engraved gemstone

2009
openaire   +1 more source

Synthetic gemstones

Quarterly Reviews, Chemical Society, 1961
openaire   +1 more source

gemstone cuts

2009
openaire   +1 more source

backing gemstones

2009
openaire   +1 more source

Gemstones Galore

Rocks & Minerals, 1975
openaire   +1 more source

Gemstone constants

1991
openaire   +1 more source

dyed gemstone

2009
openaire   +1 more source

Burma gemstones

2009
openaire   +1 more source

burnt gemstone

2009
openaire   +1 more source