SPAR
Jack's Reference Book for Home and Office : An Encyclopaedia of General Information: General Information · 1909 · p. 7
is a compound of fuoric FC ad lime with certain organic matter be t; it occurs in various colours and we th.a§ & crvstolline or non-crystalline | ** 1, usually of much beauty. It Sur plentifully in Derbyshire, where, Ide: the name of “Blue John,” it is | el mally made into ornamental ve els | 4 uall articles, and sold to tourists. | O° © mer isased as flux in the smelting sda 4 ac. [s. 146]
Readham'da tam maddeyi gor →