TERRvE SILICEiE, Quartzum. 195 
'll^ulare. IJ, Q. texturse conchaceae cryftallis tabularibus, 
Hoffmann bergm. Jottra. 1788. 1 . p, 274. 
V. Born. ind. fojf. 1 . p. 91, 
Habitat in Hungaria (prope Schemniz) & Saxonia (prope 
Fteyberg, ) utpUmmum album , rarius oljcure viref~ 
cens , tabulis ruro triedris , frequentius rhombicis. 
*ubicuni. 16. Q. texturae conchaceai, cryftallis cubicis faepiliime intus 
cavis. 
a) faciebus quadratis. 
V, Born. ind. foJf. 1 , p, il. 
Hoffmann bergm, Journ. 1788. I. p, 27J. 
Kwji. Lesk. Mineraikab. I. p. 104. 
j6) faciebus rhombicis. 
V. Born. ind. foff.X. p, 89. 
Karji. Lesk. Mineraikab. I. p, 104'. 
Habitat a,)in Suecia (prope HelffekulleJ Hungaria (prope 
Cremniz 6’ Schemniz ,) & in Saxonia ( prope Scbnee- 
berg, ) |8) in Boberaia prodic Alies) & in valle Sabau- 
dia; BijouXj^bi ftiam a cryfiallo alterius generis na 3 um , 
Cujus fatifcentis locum occupavit aut cavitatem inter- 
nam explevit, aut quam quart^i materies fenfint indura- 
ta obduxit , hinc cryjtallo priori fatifeente atque eluta 
cavum , cavitate interna, non raro quoque fuperficie ex- 
terna quarttfi pyramidali objeffa, cryjiallis ucplurimurn 
aggregatis & minoribus, albis canis , margaritaceis aut 
ex fufeo rubris , pellucidis , diaphanis vel fubopacis. 
A 
^bdri- 17. Q. texturaeconchacese , pyramide cluplici tetraedra. 
'“nr. nat, XII. 3. p. 101 . n. 4. Alumen (quartzofum) 
l^idofum quartzofum extus nigrum, 
Hojfmann bergm. Journ. 1788. I. p.il^. 
Habitat in Saxonia prope Schueeberg , canum , margari- 
tac.euai aut ex fujco rubrum , jor mani fuam eadem ra- 
tione naclum , qua cubicum , crebro intus cavum. 
‘'■edr 
tim. 18. Q. texturae concbaceae , pyramide triedra fimplic;. 
V. Born ind. jbffil, %.■ p. 88. 89. 
Habitat in Suecia (prope Heslekulle) et in Saxonia (prope 
Schneeberg , ) cryjiallis aggregatis , Jcepe inanibus , 
interdum pellucidis , rufefcentibus aut albis. 
1.9. Q. textura; ronebuace; 
verftm ftaiaci. 
: pyramide hexaedra limplici trajif- 
N. 4 
