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Obsidian


Fossilized shells, Reacts to Hcl, Hardness 3
Limestone (Coquina)


Silver Streak
Graphite


Non magnetic
Galena


Pyrite


Fluorite


Slate


Calcite


Shist


Granite


Quartz


Diorite


Granite


Thin sheets
Mica


Magnetic
Magnetite


Conglomerate


Reacts to Hcl
Marble


Gneiss


Less shiny
B coal


More shiny
A coal


Shale


Chert


Floats
Pumice






Hardness 2
Gypsum


Hardness 7
Garnet
