791. 
792. 
793. 
794. 
795. 
796. 
797. 
PO oe ee 
Mineralogical Cabinet. 45 
L. Antigua. Var. Woodstone. 
L. do. do. 
L. Hungary. do. Polished. 
L.. Antigua. A madrepore replaced by hornstone. 
Sp. 3. Uneleavable Quartz. Triv. Opal. Hyalite. 
: Menilite. 
- Hungary. Var. Precious opal. 
Saxony. ** Common opal. 
. Hungary. do. 
Dobersberg, Austria. Var. Semi-opal. 2 
Faroe. do. 
do. Var. Cacholong. 
Hungary. Var. Ferruginous opal. 
do. “Wood opal. 
. Menilmontant, France. Var. Menilite. 
- Hungary. Var. Hyalite. Upon basalt. 
. Georgia. do. In cavities of carious quartz, 
ll ay 
L. 
Lie 
L. 
L. 
L. 
L. 
L. 
or buhrstone. 
. St. Michaels. Var. Siliceous sinter. 
do. do. With sulphur and 
fragments of reeds. 
- St. Michaels. Var. Pearl sinter, incrusting siliceous 
sinter. 
Sp. 4. Empyrodoxr Quartz. Pearlstone. Pitchstone. 
Obsidian, 
Cabo de Gata, Spain. Var. Pearlstone. Containing 
small grains of obsidian, 
Meissen, Saxony. Var. Pitchstone. Yellowish, 
do. do. Green. 
Hungary. do. 
do, do. 
Mexico, do. 
Mediterranean. Var. Pumice. 
