Gem-quality pink fluorite from Planggenstock, Switzerland: chemical and physical properties and a comparison with pink fluorites from other localities

Gemology is traditionally practiced in laboratories, focused on identifying and analyzing gemstones.

Fancy colour diamonds that derive their colour from nitro- gen-related defects (such as N3/N2 center

The Salininha emerald deposit located in the municipality of Pilão Arcado, Bahia State, represents