Rock 366 : Day 280 : Larnite, Scawtite and Spurrite

Day 280 : Three calcium silicate / nesosilicate with carbonate minerals created when high temperature molten basalt comes into contact with chalk or limestone, Larnite [Ca2SiO4], Scawtite [Ca7(Si3O9)2CO3·2H2O] and Spurrite [Ca5(SiO4)2(CO3)]. From the type locality of the second mineral, Scawt Hill, Larne, County Antrim, Northern Ireland. Cotton collection, Keele.