Pankkaliet
Pankkaliet is a rare mineral discovered in the early 20th century. It is a calcium-rich silicate that typically forms in metamorphic rocks. The mineral is known for its distinctive pale green to yellowish-green color, often with a vitreous luster. Its crystal structure is complex, contributing to its relative scarcity.
The geological conditions required for pankkaliet formation are quite specific, usually involving high temperatures and pressures