Fire opal, Mexico
Twin-crystal of chrysoberyl
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Colour zoning in ruby from Mong-Shu, Burma
Inclusions of gilalite aggregates in rock crystal from Brazil
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil
Inclusion of apatite in ruby from Tanzania

Actuel

Réservez ces dates :

Conférence nationale 2024: Hotel- und Conference Center Sempachersee, Nottwil
09.06. - 11.06.2024

www.hotelsempachersee.ch

Hotel Sempachersee