Ingrid Lerouyer

Publication

L’antlérite, une nouvelle espèce gemme

Aurélien Delaunay (1), Emmanuel Fritsch (2) & Ingrid Lerouyer (3) Abstract In a batch of variscite, one sample stood out because of its slightly different color and texture. Laboratory analysis showed that it is an antlerite, Cu3(SO4)(OH)4 a rare mineral that is generally better known in mineralogy than in gemology. This specimen is currently an […]

Publication

Les verres naturels

Ingrid Lerouyer (1) Abstract This article presents the main varieties of natural glasses and classifies them into three categories, each linked to their mode of formation. In the wild, glass can be found through volcanic, meteoritic impact or lightning-related events. At the end of this article, a table lists the characteristics and optical phenomena most […]