PHYSIOGRAPHY. CLASS n. 



bohedral Quartz, rhombohedral Emerald, &c., and this is 

 the mode in which Physalite occurs. It is found likewise 

 in veins and beds in gneiss, mica-slate, clay-slate, and por- 

 phyry, with pyramidal Tin-ore and prismatic Scheelium- 

 ore, also with rhombohedral and octahedral Fluor-haloide, 

 with rhombohedral Emerald, rhombohedral Quartz, &c. 

 It is met with, besides, in tin stream works, and in the 

 alluvial deposits of rivers, along with other gems. 



4. Most perfect crystals of this species have been brought 

 from Siberia, where they are found of green, blue, and 

 white colours, along Avith rhombohedral Emerald, in the 

 Uralian and Altai mountains, and also in Kamtschatka ; 

 from Brazil, where they are generally met with in loose 

 crystals and pebbles of high yellow colours ; from Mucla 

 in Asia Minor, in pale straw-yellow, but well pronounced 

 crystals, &c. They occur in the rock called Schnecken- 

 stein in Saxony, of a wine-yellow colour, at Ehrenfrieders- 

 dorf, Zinnwald, &c. along with Tin-ore, and in similar reposi- 

 tories at Schlaggenwald in Bohemia, and St Michaelsmount 

 in Cornwall ; with Lepidolite near Rozena in Moravia. 

 Physalite is found at Finbo and Broddbo near Fahlun in 

 Sweden, Pycnite at Altenberg in Saxony. In pebbles and 

 isolated crystals, it is found in the stream-works of Euben- 

 stock in Saxony, and in the granitic detritus at Cairngorm in 

 Aberdeenshire, of various blueish and brownish tints, often 

 regularly distributed in the same individual along the edges 

 of the crystal. The varieties from the latter place are some- 

 times beautifully crystallised. This is also the kind of re- 

 pository in which are found the white transparent varieties 

 of New South Wales. 



5. It is used as an ornamental stone, but less valued than 

 some of the preceding species. The blue varieties are 

 called oriental Aquamarine by lapidaries. J[f exposed to heat, 

 the prismatic Topaz from Saxony loses its colour, and be- 

 comes white ; the deep yellow Brazilian varieties assume a 

 pale pink colour, and are then sometimes mistaken for Spi- 

 nelle or Ballas ruby. 



