Fluorapatite

This specimen features a lovely, dark blue, fluorapatite crystal with good translucency and a single well-terminated end. This piece originates from Lac-Sainte-Marie, Quebec, an obscure yet notable locality within the Grenville Province, renowned for its abundance of pegmatites. During the Grenvillian orogeny, these rocks experienced intense deformation and high-grade metamorphism, resulting in a predominance of calcitic marbles in the region. Metasomatic reaction zones formed at the contacts between calcitic marbles and silicate rocks, generating higher-than-usual concentrations of fluorapatite, making this specimen a good example from this geologically intriguing area.