The Valzergues fluorite mine is famous among European collectors for its fabulous specimens of brigh yellow, sometime almost orange, gemmy fluorite in large cubic crystals up to 30 cm and clusters....
Amethyst is the purple color variety of crystalline quartz and is the most popular gemstone from ages past. Even if the definition gives purple as the color (with various saturation, from very light to...
The very light-yellow stone described in this report was reported as a bytownite-anorthite plagioclase feldspar mined in the Le Puy-En-Velay area in south of Auvergne in France. Plagioclases form the...
Pink fluorite is found in Mont Blanc massif, either in France or in Switzerland, the 2.60 ct light-pink fluorite gemstone shown in figure 1 is a sample that reportedly comes from the french border....
According to Mindat.org: "The Riou Pezzouliou is a small brook which runs on the right side of the river La Borne. Well known since the Middle-Age for alluvial gem-quality sapphires and zircons. The...