Mineral Nature

Crystall is a brighte stone and clere with watry colour. Men trowe that it is of snowe or yse made harde in space of many yeres. Therfore the Grekes yave a name therto. It is gendred in Asia and in Cipres, and namely in the northe moutaynes where the sonne is mooste feruent in somer.

Bartholomew Glanville, “De proprietatibus rerum*,“ c. 1240, translated by John of Trevisa c. 1398