Rubies from Greenland
Vincent Pardieu
On the nature of blue rose quartz
Over the past several years, the market for pink-coloured rose quartz has been augmented by variants
Nitrogen aggregates in yellow HPHT and CVD synthetic diamonds
Yuri Shelementyev, Galina Kriulina, Olga Yarapova, Viktor Vins, and Alexander Stolyarevich
