Any notable length of infilled mineralization
Any notable length of infilled mineralization
Characteristic colour patterns in usually sedimentary rock
A gray to white, ductile, metal. Symbol, V
Benefit minus cost
An opening in the Earth to facilitate the flow of volcanic fluids, gases and materials
A small cavity occurring in rock, through trapped gases and/or internal crystallization
Any material of volcanic origin
A mineral, element or substance easily prone to a change in state
Used to describe minerals with a glassy appearance
Gold which may be identified visually, unaided