Red and green labradorite feldspar from the Congo
Red and green labradorite feldspar from the Congo. Publ […]
Synthetic Verneuil corundum with unusual color zoning
Synthetic Verneuil corundum with unusual color zoning. […]
To what an extent a jeweller can detect treated diamonds
To what an extent a jeweller can detect treated diamond […]
Pezzottaite, a new mineral and gem
Pezzottaite, a new mineral and gem. Published in Journa […]
GemLIBS: a new analytical instrument to analyse beryllium in orange sapphires
GemLIBS: a new analytical instrument to analyse berylli […]
Ein notwendiger Test in der Perlenuntersuchung
Ein notwendiger Test in der Perlenuntersuchung. Publish […]
Are new sapphires from Sri Lanka diffusion-treated or not?
Are new sapphires from Sri Lanka diffusion-treated or n […]
Spectroscopic properties of an historical greenish yellow diamond
Spectroscopic properties of an historical greenish yell […]