152 
VICTOR ZSIVNY 
crystallised Pyrite and Dolomite, rarely even with crystallised Quartz ; 
frequently they are sprinkled on the surface with tiny Pyrite crystals. 
They are columnar in the direction of the principal axis, rarely acicular ; 
the columns are sometimes after a (100) strongly flattened. The normally 
developed and only on one end grown on columns reach a length of 
4 mm. and a thickness of 2 mm. 
At their preliminary examination I found forms till now unknown 
as far as Recsk is concerned. 
Asteroidal twins are very frequently occuring. 
The cover-forming crystals of Pyrite are generally very small and 
imperfect, theier size can be expressed only by fractions of the mm., but 
in rare cases they reach even the size of 6 mm. The larger ones are 
of an octahedral habit and their faces are, to the greater part, uneven. 
The prysmatic crystals of Quartz , wich are terminated or doubly 
terminated by rhombohedral faces, are ol a length of 3 U —l 1 /2 mm., very 
perfect, totally transparent and colourless, growing on Dolomite or Pyrite. 
The tabular crystals of Dolomite , being grown on to Enargite and 
Pyrite are only rarely terminated by plane faces ; the well-developed 
crystals are, on the whole, similar to those above described as far as 
their form is concerned. Their chemical composition, after a preliminary 
not quite exact analysis for which approximately 0*04—0*04 grm. substance 
was used, is very near to and could eventually be totally identical with 
the formerly described crystals, as well as with those of the normal 
Dolomite. 
