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. […]
Pezzottaite, a new mineral and gem
Pezzottaite, a new mineral and gem. Published in Journa […]
Poudretteite: A rare gem species from the Mogok Valley
Poudretteite: A rare gem species from the Mogok Valley. […]
Der Stein des Regenbogens: “Rainbow Calsilica”
Der Stein des Regenbogens: “Rainbow CalsilicaR […]
Caesiumreiche Morganite aus Afghanistan und Madagaskar
Caesiumreiche Morganite aus Afghanistan und Madagaskar. […]
Caesium-rich morganite from Afghanistan and Madagascar
Caesium-rich morganite from Afghanistan and Madagascar. […]
