Colour varieties of gems – where to set the boundary?
by Dr. M.S. Krzemnicki, first published in Facette 26 ( […]
Update on unheated Mozambique rubies
by Dr. M.S. Krzemnicki, first published in Facette […]
One natural pearl in a cultured pearl necklace
Testing pearl necklaces can be rather painstaking work, […]
Diamonds as a window into the earth
by Dr. L. Speich, first published in Facette 26 (M […]
New statistical methods for analysis of gemstones
Based on real case studies on sapphire and emerald specimens, we here present how a simultaneous multi-element approach assists origin determination. Instead of pre-defining a list of isotopes in advance, routine analysis of blue sapphires using LA-ICP-TOF-MS detects rarely occurring trace elements such as bery
Deep purple vesuviatine from Pakistan
by Prof. H.A. Hänni, first published in Facette 26 (May […]