Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Fire opal, Mexico
Stress fissure («sun spangle») in baltic amber
Colour zoning in ruby from Mong-Shu, Burma
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusion of apatite in ruby from Tanzania
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Twin-crystal of chrysoberyl

Attualita’

Conferenza nazionale 2025:

15.06. - 17.06.2025

Seehotel Wilerbad, Wilen am Sarnersee

Il modulo di iscrizione e il programma saranno pubblicati qui nella primavera del 2025 e inviati ai soci via e-mail.

Seehotel Wilerbad, Wilen am Sarnersee