New Specific Gravities of Minerals. 269 
23. 3.830, Colophonite, which is the true dodecahedral garnet 
and ought to be hentai to the Aplome, from 
Arendal. 
N.B. These three substances, ie called colophonite, and 
not exhibiting any varieties to the eye, have on account of their 
form of cleavage and crystals been clearly distinguished by Brei- 
thaupt as as pyroxene, tetragonal and dodecahedral garnet ; the col- 
ophonite is most frequently, tetragonal. 
Earthy sulphate of barytes, Saxony. 
25. 2.510, Metaxite, from Silesia. 
26. 2.518, Picrolite, from Silesia. 
27. 2.334, Lasionite, (Wavellite,) from Freiberg. 
28. 2.981, Nephrite, greenish grey to mountain green variety, 
. from a lump of 76 Ibs. 
29. 2.952, Granular tremoline amphibole, (tremolite,) from Swe- 
den, accompanying arsenical pyrites in talcose 
slate. 
30. 2.574, Alum slate from Strehla, Saxony, the only slate 
where chiastolite has been found. 
31. 4.450, Sulphate of barytes, from Saxony. 
32. 2.741, Calcareous spar, (the heaviest calcareous. spar of 
R=105° 8’. 
33. 2.705, Polymorphous calcareous spar, (the lighter.) 
34. 4.787, A characteristic hepatic pyrites, Freiberg. 
35. 3.063, Black schorl, yet belonging to the dicromatic, from 
rol. 
36. 17.300, Four fine pure grains of iridosmin, Uralian moun- 
tains. 
37. 2.655, Common greenish gray quartz. 
38. 2.185, Galapectite, from Silesia, (new mineral and new lo- 
cality.) 
39. 2.702, A mineral similar to magnesite, accompanying the 
kerolite, from Silesia. 
40. 4.202, Almandin garnet, from Freiberg. 
41. 3.255, A problematic pyroxene in basalt, from Silesia. 
42. 3.320, Black amphibole, from Bohemia. 
43. 5.577, Pyrites, Hessia. 
44. 6.195, Cobaltic marcasite, (arsenical cobalt,) from Schnee- 
erg. 
45. 6.304. The same, in fragmentary erystals, from Hessia. 
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