Colourless to near colourless diopside from Canada and Kenya
Colourless to near colourless diopside from Canada and […]
Quartz with radiating fibres, sold as Trapiche quartz
Quartz with radiating fibres, sold as Trapiche quartz. […]
Alumosilicates: Andalusite, Kyanite, Sillimanite
Alumosilicates: Andalusite, Kyanite, Sillimanite. Publi […]
Natural and synthetic vanadium-bearing chrysoberyl
Natural and synthetic vanadium-bearing chrysoberyl. Pub […]
The role of vanadium and titanium in natural and synthetic chrysoberyl and alexandrite – coloration, chatoyancy and asterism
The role of vanadium and titanium in natural and synthe […]
Some uncommon sapphire “imitations”: Blue Co-zirconia, kyanite and blue dumortierite
Some uncommon sapphire “imitations”: Blue Co-zirconia, […]
A historic turquoise jewelry set containing fossilized dentine (odontolite) and glass
A historic turquoise jewelry set containing fossilized […]
Chrysoberyl: a gem with many faces
Chrysoberyl: a gem with many faces. Published in GAHK J […]
Interesting muscovite specimens from Pakistan: epitaxial incrustation and pseudomorphism after beryl
Interesting muscovite specimens from Pakistan: epitaxia […]
Künstliches Glas mit interessantem Farbeffekt – Grüsse aus dem Weltall oder doch sehr irdisch?
Künstliches Glas mit interessantem Farbeffekt – G […]