G. J. Brush’s Mineralogical Notices. 69 
The ens that I have examined were brought from China 
by Dr. O White of New Haven. Dr. White informs me that 
the > So obtain this “ figure-stone” from the mountains, about 
twenty English miles from Fuhchau 
The mineral has a white to greenish- -white color and is trans- 
lucent; it is ectly iar 2 Ta sometimes veined like marble, 
the color of the Ries being dark red and due to the presence 
of sesquioxyd of ir B.B. infusible, or festa only on the 
thinnest edges ; Sai with nitrate of cobalt gives the reac- 
tion for alumina; not decom by acids. Hardness 8. Spe- 
Analysis showe it to be a hydrous silicate 
e, ay esia, and alkalies. Of 
the following Nos. 1, 2 and 8 are the original analyses by 
Walmstedt, and No. 4is my analysis. 
Si Al Fe Oa Mg S KNa H 
1 65°96 28°58 0-09 018 0-15 _— — 5°16 
2 66°38 27°95 0°06 0-18 0-06 ar -—— 520 
3. 65°65 28°79 0°28 0°23 tr. er. — 611 
4, 65°95 28:97 . 0°22 — -—— 0°25 548 
Their close correspondence with pyrophyllite may be seen by 
comparing them with the following analyses of that spans 
i 
Si 21 Fe Ca Mg Mn 
gs ay 6614 2587 —— 039 149 —- 5.59 Rammelsberg.* 
6777 2517 O82 066 0-26 582): 
Sp. gr.=2'78, | wot 2609 070 0:69 0:09 O09 7085 woeeren-t 
Dis- § 64°82 96 055 083 — 525 
abi ge 6601 2852 087 023 018 529 5 Genth.f 
riety, sa this is ge to a diffe 
same circumstance explains the ‘fteoons in Mhasibility. "The 
compact ct: pyrophyllite seems to bear the same relation to the 
foliated variety, as steatite bears to foliated tale. 
The formule of tale and pyrophyllite are as follows : 
aie 
Tt is hence obyiows that te de two are analogous in chemical com- 
mane: 
: io ool Unionite. 
In ti fa Goutead: [2], xv, 211, Prof. J. Lawrence Smith and 
myself <i analyses of a mineral which we supposed to 
. Ann., lxviii, 
* Pogg. 513. { Oefy. K. V. Ak. Forh., 1848, 110, 
¢ This Journal, ey xvill, 410. 
