Color: gray-black
State at 25°C: solid
Density (g/cm3): 2.336
Hardness (Mohs): 7
Melting Point (K): 1683.2
Boiling Point (K): 3553
Heat of Fusion (kJ/mol): 39.6
Heat of Vaporization (kJ/mol): 383
Heat of Atomization (kJ/mol): 452
Therm. Conductivity (J/m sec K): 149
Elec. Conductivity (1/mohm cm): 0.012
Abundance, Solar System: 6.000
Abundance, Earth's Crust: 5.5
Pure Cost ($/100g): $ 5.40
Bulk Cost ($/100g): $ 0.14
Source: Quartz (oxide)