2o8 
EARTHS. AGGREGATE. 64. Arenarius. 
foiis; the mica white or black, and difpofcd longitudinally 
or in dots : it has generally a Haty, fometiraes an undulately 
llaty texture, and may ealily be feparated into plates; it i* 
found in layers, and when broken, has a rather glittering 
clayey appearance, exhibiting mollly a line grain. 
molaris. H^ard, conlifting of unequal angular grains of quartz and 
feldfpar interfperfed with mica. 
Cos particularis, &c. Syfi. nat. xii. 3. p. 64. n, 13. 
Cos partic. major. Wall.fiji. p, igg. n. 10. 
Mlll-ftone. Schmeider mineral, i. p. 328. 
2. Containing garnets or cryllallizeJ fliorl. 
Saxam molinum. Syft. nat. xii. 3. p. yj. n. 17. 
Found generally through Eurepe : is of a very hard texture, and 
is uled for corn-m:!ls: the grains of quartz are tranfparent, 
generally white, and larger ; thofe of the feldfpar are lefs» 
more opake, and grey. 
cempaSus. Hard, confiding of grains of ochre-yellow quartz and red 
garnets. 
Cos partic. arcnac. Syft. nat, xii. 3. 63. n. 11. 
2. Fiffile, and mixed with filvery mica. 
Saxum punflatura. Sy/t. nat. xii. 3. p. 78. n, 28. 
Found in Dahcarlia and Wejlrogoth in Sn-veden, and is ufed as a 
coarfer kind of mill-llone. 
radians. Hard, variegated with columns of black fliorl difpofed in 
a ftellate manner, and interfperfed with grains ot 
purple garnets. 
Sax. cotac. ilriis atris. Syft. nat. xii. 3. p, 74, «. 10. 
Found in Svseden, of a pale colour. 
decussatus. Hard, reddifli-tvhite, varied with black erc£l and decuf- 
fating fcales of hornblend. 
Saxum cotaceuin, &c, Sy/t. nat. xii. 3. p. 75. n. 15. 
Found at Killmerac in Sweden, 
frumentalis. Varied with interfperfed foliations and lanceolate fpots of 
talc. 
Sax. cotacco-takof, Sy/t. nat. xii. 3./. 75. n. 16. 
Found in Gert/iuny, 
-iiarklosus. White, in fmall grain.s, filtering water, with ferruginous 
perforations. Tiger-Jione. 
Cot partic. glareof, Sy/t. nat. xii. 3. p. 62. n. 5. 
Found in Neriaa and IVe/trogoth in Sweden; the fpots and per» 
lorations originate from fmall pieces ofpvrites imbedded, and 
which moulder into an ochraceous oxyde. 
