LORENZENITE Na2Ti2Si2O9 (orthorhombic) variety ramsayite, deep brown opaque crystal in syenite． Kola Peninsula, Murmansk District, Russia．

LORENZENITE 於近５０年才被提及，僅發現於 coast of Greenland and on the Kola Pennisula兩處．為含鈦礦物，與金紅石同樣散發出強烈的光澤，晶體柱狀六面體，但常見扁平板狀，黃或暗棕色，硬度６，透明至半透明．玻璃至次金屬光澤．為罕見之礦．

經典名礦欣賞．２．３．４

NO.643