Rockhounding in West Virginia – What Rocks You Can Find and Where
Upcoming Rockhounding Events in West Virginia Bituminous Coal Hardness: 2 – 2.5 Streak: Black Chemical Formula: C137H97O9NS Bituminous Coal is one of the four recognized varieties of coal. It is the most abundant and it frequently used for heat generation, but it not as efficient as Anthracite Coal which is the highest grade of coal….