Color Genesis Analysis and Characteristics for Origin Identification of Purple Jadeite

Gem-quality sapphires containing ‘exotic’ elements such as Sn, Nb, Zr, Ta, W, are of special int

This paper aims to present the history of the modification of Baltic amber (succinite), and particul

Malacacheta, located in Minas Gerais, Brazil, is renowned for its alexandrite deposits and com-plex