172 
SarJus, 
dendriticus. 
EARTHS. SILICEOUS. 56. Chalcedonius, 
Pale, variegated with blood-red dots and drops. 
Silex vagus. Syft. nat. xii. 3./. 68. a. 5. 
Caeneolus albefcens, Wall.fyji. i./>- 274. a. 14. f. 
Sardoine. Schmeifser piiner. 110. 
Found in India, Sardinia, near Oberftein in the Palatinate; cO- 
lour grey, or a little milky, rarely brown. 
Pale, painted with deeper-coloured arborefcent ramifica* 
lions. Mocha Jlont‘ 
Achates figuratus. TVall.Jysi. 1. p. 283. n, 22. I. 
Found in the Paft, Iceland, the Palatinate the Rhine, and orhe*” 
parts of Europe : colour white or grey with fhrub like black' 
brown, red, or green pidurcs : thofe of the Eaft are ellceme'i 
very valuable. 
maeulatus. Marked with fpots differing in colour and in degree of 
tranfparency. 
P!afma._ Tho.mfonchem. 3.;>. 53t, Jamsi/on min. 1./. 189. 
Found in Ceylon, the Peroe tjlands, Italy, and the Palatinatf- 
colour wine-yellow with darker fpots, perlaceous or veilo^''‘' 
ifh-brown with milk-white fpots difpofed in rings, milk' 
white with black or red fpots, blood-red with brown of 
white fpots, or grey, grafs-grcen, or olive-green variegated 
with fpots of a reddilh or whitilh colour. 
faseiatus. 
Onyx, 
Marked with bands differing in colour and degree of 
tranfparency. 
Sardonyx. Schmeifser miner, t.p.iii. 
Found in Ceylon, Feroe and Iceland, Bohemia and Saxony : colouf 
grey, fomewhat pellucid, with milk-white diaphanous bandfi 
rarely wirh thole that are rofy or green, or blueillt or blood- 
red with white or grey bands ; the bands are narrower of 
broader, of equal or unequal width, parallel, confluent, 
ftraight, angular or undulate. 
Breaking into concentrically cruftofe fragments differing 
in colony and degree of tranfparency. 
Silex vagus. Sytt. nat, xii. 3. p. 6g. «. 7. 
Achates, Wall. JyR, min. l. p. 276. n. 16. 
Onyx. Schmeiffer mineral, l. p. 108. 
Found in the Eaft Indies, Siberia, Bohemia, Portugal and Saxonit 
in thicker or thinner fragments, and foraetimes in pebbles t 
colours grey and black, white flclh-colonr and black, red and 
white, white and grey, various lhades of yellow, alternating 
in various manners, generally in concentric circles : it lofc® 
its colour in the lire, and cracks and breaks if the heat be fud- 
den or violent : it is the hardeft of all its genus : fpecifi<^ 
gravity from 2,500, to 2,600, 
