BOCKS, ir>7 



IfifneoilS, continued. 



Lava with Mica. Layo di Nemi, near Rome. 



with Obsidian. Vesuvius. 

 Talc. Waldemian Valleys, Italy. 

 Pitchstone. Arran, Scotland. 

 Micaceous Quartzite. Hammerfest, Norway. 

 Melaphere - black Porphyry. 

 Sperone di Tuscolo. Appian Way, Rome. 



