Found: mostly in Kuji (North Japan), also in Mizunami and Chosi. Amber from Kuji is deposited on the mountain‘s slopes at about 600 meters depth. Age: Kuji amber is 85 Ma. (Late Cretaceous period), Chosi amber is 110 Ma. (Cretaceous period) Mother-plant: unknown Colours: from green to black, Chosi amber is a type with a very varied spectrum of colours, Mizunami amber is dark, brown or intensive red color Inclusions: rare Special characteristics: most of the pieces are cracked because of seismic tremors and the high pressure at considerable depths. The cracks often contain quartz crystals.