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Genthelvite. Genthelvite Aegirine Locality Poudrette quarry Demix quarry UniMix quarry Desourdy quarry Carrire Mont SaintHilaire Mont SaintHilaire Rouville RCM Montrgie Qubec Canada Xls to mm on edge Via JeanPierre Beckerich MOB coll very clean and sharp penetration twin The xls are quite gemmy something that is more apparent