VILLIAUMITE NaF (cubic) . Kola Peninsula／Murmansk District, Russia . Deep carmine red , translucent and vitreous . 本礦為鈉的氟化物，晶體細小，常以解理完整的暗紅色正方塊狀呈現．硬度 2∼2.5 .產於 Nepheline syenite 的裂隙．為罕見之礦．
礦名來源：Named after the French traveller, Villium.

經典名礦欣賞．２．３．４
NO.231