Kerolite
![Chrysoprase whose green coloring results from to the addition of Kerolite](/Images/godic/202501/22/Chryzopras_Polsko0555.jpg")
Kerolite or Cerolite is a metamorphic nickel bearing phyllosilicate mineral variety of talc, can be seen as a mixture of serpentine and saponite as well. It has the formula: (Mg,Ni)3Si4O10(OH)2·H2O. It is often considered as a talc variety and it was discredited 1979.