Quick Mineral Reference Guide

Mineral Name	Cleavage/Fracture	Hardness (Mohs)	Density (g/cm^3)	Streak	Lustre	Colour	Other Diagnostic
Quartz	*none/concoidal	7	2.65	scratches streak plate	vitreous	colourless, milky, variable	hexagonal prisms terminating in prisms
Orthoclase Feldspar	*2 good, 90	*6	2.6	scratches streak plate	vitreous	*flesh, pink, white	*simple twin
Plagioclase Feldspar	*2 good, 90	*6
Muscovite Mica	*1 perfect (basal)	*2.5
Biotite Mica	*1 perfect (basal)	*2.5-3
Chlorite Mica	*1 perfect (basal)	*2
Hornblende	*2 good, 60/120	*5-6
Augite	*2 good, 90	*5-6
Olivine	none/concoidal	*6-7
Chiastolite/Andalusite	poor 1/uneven fracture	7.5
Garnet	none/concoidal	*6.5-7.5
Calcite	*3 good, perfect rhombs	*3
Flourite	4 good, parallel to octahedron	*4
Halite	3 good, 90 cubic	*2.5
Gypsum	1 good (basal)	*1.5-2
Barites	2 good, 90	*3-3.5
Chalcopyrite	poor/concoidal	4
Pyrite	none/concoidal	*6
Galena	*3 good, 90 cubic	*2.5
Haematite	poor/subconcoidal	*5.5-6.5
Average age		33