FLINT-GENUS,. Opaque, Hard, but not in a high degree. Pretty eafily frangible. Not particularly heavy. \ O li;, Geognoftic Situation. ' It is found in fimilar formations and repofitories with flinty flate. Geographic Situation, x Found near Prague and Carlfbad in Bohemia; at Hainchen nearFreyberg in Saxony ; in the Harz, and in the Moorfoot and Pentland Hills, near Edin burgh. • . Ufe. ■ '.-o'- ' •' > • Vf r, When polifhed, it is ufed as a teft (tone, for. deter mining the purity of gold and filver : owing, ever, to its great’ hardnefs, it is lefs fuited for this pn r ' pofe than bafalt, and fome varieties of clay flate. - jO •' ‘ . i . h: ObfervatioM.
