C>UARTZ;/p 151 Geographic Situation. It was firft difcovered in Bavaria, afterwards in Sweden, Greenland, at Hohenftein in Saxony, Sibe ria, and in the ifland of Coll, one of the Scottilh Hebrides. \ U/e. . ,1 . : -■ ' ( 1. It is employed in jewellery. It takes a good polifh, and when the colour is good the ornaments made of it are beautiful. When cut and polifhed and of a good colour, it is fold for fpinelle, yet its defi ciency in hardnefs, tranfparency, and fire is fo great, that the deception is eafily dete&ed. 2. Ihe milk white variety, when cut, opalefces into wine yellow. 3. It lofes its colour by keeping, particularly if in a warm place. FOURTH