#  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  Y  Z

Chert Stone

A stone with a high silica content, used for grinding CALCINED FLINT. Hard varieties, used as pavers, are obtained from N. Wales near Gronant & at Richmond Yorks. Softer varieties veined with limestone, used as RUNNERS, from Derbyshire.