Earths. MINERALOGY. Earths. 
468 
in various proportions, and exhibiting a radiated appear¬ 
ance, rather converging towards the centre of the ball. 
The fecond layer, which is of a greeniih-black colour, 
and about one line thick, is compofed of fine laminar 
hornblende ; and this is fucceeded by a white, generally 
tranflucid, quartz layer, of about four or five lines in 
thicknefs, inclufive of two or three very thin layers of 
hornblende, that are generally feen within the fubftance 
of this third principal layer. Each of thefe layers is ge¬ 
nerally of equal thicknefs in the whole of its circumfe¬ 
rence. Thele three parts may be confidered as the coat¬ 
ing: the interior of each ball is lefs defined than the fur¬ 
rounding layers; it confilts of a blackilh and a whitifii 
fubftance, the former furrounded by and palling into the 
latter, the centre of which is ufually a dark-grey fpot. 
The quarry of this rock is unknown, a fingle block 
only having been found in the Gulf of Valinco, in Corfica: 
its weight was about eighty pounds; but it was foon 
broken into fmall fragments, which are now diftributed 
among colle<5tors. There is a beautiful vafe of it, one 
foot fix inches high, in the cabinet of M. Dedree. The 
granite of Corfica is figured by M. Faujas de St. Fond, 
in his Eflai de Geologie, and in Mr. Sowerby’s Exotic 
Mineralogy. 
4. Granites fcorlinus: confifting of felfpar, quartz, and 
fliorl. Found commonly in the mountains of Sweden, 
Silefia, and Swifierland. 
5. Granites granaticus: confifting of felfpar, quartz, 
and garnets. Found in the Swifs and Swedilh mountains. 
6. Granites viridis : confifting of felfpar, quartz, and 
amarus. Found commonly in the mountains of Swifler- 
land. 
7. Granites talcofus: confifting of felfpar, quartz, and 
talc. Found nearLintz in Upper Auftria. 
8. Granites micaceus: compofed of felfpar and mica. 
Found very rarely in Swifierland and Silefia, in Finland 
and Gothland, and detached near Geneva and Vefuvius. 
9. Granites calcarius: compofed of felfpar and calca¬ 
reous fpar. Found in the neighbourhood of Vefuvius; 
brittle, not hard, effervefcing with acids, and fometimes 
containing fmall portions of fcorl, mica, alumine. 
10. Granites grandaevus : compofed of mica and horn¬ 
blende. Found fometimes in large rocks, in various 
mountains of Swifierland, Sweden, and Bohemia; fre¬ 
quently rich in veins of iron. A dull-greeniih variety 
is generally uled in fome parts of Sweden as a flux for 
iron-ore. 
11. Granites fcorlaceus: compofed of felfpar and fliorl. 
Found in the mountains of Swifierland, and near Vefu¬ 
vius; fometimes containing mica or hornblende. 
12. Granites fquamofus: compofed of felfpar and horn¬ 
blende. Found in the mountains of Swifierland, and in 
Zealand; often containing a fmall quantity of mica or 
fliorl. 
13. Granites granatinus: compofed of felfpar and gar¬ 
nets. Found in the mountains of Swifierland, in Zea¬ 
land, and the neighbourhood of Vefuvius. 
14. Granites nitens : compofed of felfpar, garnets, and 
mica. Found in the mountains of Swifierland. 
15. Granites tricolor: compofed of felfpar, garnets, 
and Ihorl. 16. Granites dichrous : compofed of felfpar, 
granatine, and common fliorl. 17. Granites albo-fufcus : 
compofed of felfpar, granatine, fliorl, and mica. 18. Gra¬ 
nites elegans: compofed of felfpar, garnets, and aftinote. 
All found in the neighbourhood of Vefuvius. 
19. Granites micans: compofed of felfpar, mica, and 
fliorl. Found in the mountains of Swifierland, and in 
Vefuvius ; fometimes the mica, fometimes the fliorl, pre¬ 
dominating, in larger or lefs particles; garnets are fome¬ 
times found immerfed. 
20. Granites lamellofus': confifting of felfpar, mica, and 
fliorl. Found in the mountains of Swifierland ; fometimes 
one fometimes the other ingredient predominating. 
21. Granites cretaceus: confifting of felfpar, mica, and 
chalk. 22, Granites gioeni: confifting of felipar, garnets, 
3 
and hornblende. 23. Granites varius; confifting of fel¬ 
fpar, aftinote, and fliorl. 24. Granites leucomelas : con¬ 
fifting of felfpar, a&inote, and hornblende. Thefe fpe- 
cies are all found in the neighbourhood of Vefuvius. 
25. Granites muriaticus r confifting of felfpar, mica, 
and bitter earth. Found in the mountains of Swifierland, 
26. Granites ferpentinus : confifting of felfpar, ferpen- 
tine, and quartz. Found in the mountains of Tranlyl- 
vania, and eafily moulders into alumine. 
27. Granites garpenbergenfis: confifting of the greater 
part quartz and mica. Found near Garpenburg in Swe¬ 
den, and containing veins of copper or iron, in the moun¬ 
tains of Silefia, Saxony, and Swifierland; likewifc de¬ 
tached in Spain. 
0 . Avanturine: with the foliations of filvery or gold 
mica fo interfperfed as to exhibit a rich luftre when 
polifhed. 
28. Granites bicolor: confifting of quartz, mica, and 
Ihorl. 29. Granites corneus: confifting of quartz, mica, 
and hornblende. 30. Granites triplex: confifting of 
quartz, mica, and garnets. 31. Granites glacialis : con¬ 
fifting of quartz, mica, and amarus. Found in the moun¬ 
tains of Swifierland. 
32. Granites inconfpicuus: compofed of quartz and 
hornblende. Found in the mountains of Swifierland, and 
even near Altenberg in Saxony. 
33. Granites helveticus: compofed of quartz, horn¬ 
blende, and garnets. 34. Granites yariegatus : compofed 
of quartz, hornblende, and amarus. Found in the moun¬ 
tains of Swifierland. 
35. Granites capillaris: compofed of pellucid quartz, 
and fpicules of granadille. Found detached in the Ural 
valleys of Siberia: admits a very high polifli: the fpike- 
lets are yellowith or reddith, fometimes dull red, immerfed 
in tranfparent colourlefs quartz. 
36. Granites acicularis: compofed of pellucid quartz, 
and fpicules of aftinote. Found detached at the bafe of 
the Sabaudic mountains near Geneva. 
37. Granites melaleucos: compofed of quartz and Ihorl. 
Found in the mountains of Swifierland and Sweden. 
38. Granites Hoepneri: confifting of quartz, horn¬ 
blende, and fliorl. Found in the mountains of Swilfer- 
Iand. 
39. Granites efflorefcens: confifting of quartz, fliorl, 
and amarus. Found in the mountains of Swifierland ; 
and frequently contains efflorefcent fulphat of magnefia. 
40. Granites Tirolenfis : confifting of quartz, Ihorl, and 
garnets. Found in the Swifs and Tyrolefe mountains, 
near Zillerthal. 
41. Granites Bavaricus ! confifting of quartz and gar¬ 
nets. Found in the mountains of Swifierland, Sweden, 
Saxony, Auftria, Hungary, Tyrol, and Bavaria, and the 
valleys which border upon them: the garnets are red, 
and the quartz grey or greenifli, rarely grafs-green. 
42. Granites duriflimus: confifting of quartz, granites, 
and amarus. Found in the mountains of Swifierland. 
43. Granites talcifer: confifting of the greater part 
quartz and talc. Found in the Alps near Clavennam 
and Marmels; fometimes rendered yellowifh by a mix¬ 
ture of iron ochre. 
44. Granites fplendidus : confifting of quartz, and fmall 
particles of mica and iron pyrites interfperfed. Found 
detached in the Ukrane mountains; and is very fplendid 
when polilhed. 
45. Granites homogeneus: confifting of mica, horn¬ 
blende, and ihorl. Found in the mountains of Swifierland. 
46. Granites nitidulus: confifting of mica and horn¬ 
blende. Found in the neighbourhood of Vefuvius; and 
has often garnets immerfed in it. 
47. Granites zillenfis : compofed of mica and fliorl. 
Found in the mountains of Swifierland, and in-the valley 
Zillerthal, between Tyrol and Saltzburg. The cryftals 
of ihorl are fometimes larger, fometimes l'maller: and not 
unfrequently eleftric. 
48. Granites granatifer: compofed of mica and garnets. 
Found 
