Although gold is frequently accompanied by silica (quartz), silica (quartz) is far more common than gold, and occurs ubiquitously (all over the place) whereas gold is far more rare. You MIGHT find some gold with quartz veins, but not always, and even if there might be some gold, the chances that there is enough to be worth mining are not very good.
Quartz veins often fluctuate widely in value, with the richest gold ore occurring in pockets or bonanzas as they are sometimes called. In some mining districts the bulk of the gold is found in these rich pockets and the rest of the vein may be nearly barren.
Quartz mining definition is the mining of gold on veins or ore bodies in place as distinguished from surface digging or washing : underground mining in rock. the mining of gold on veins or ore bodies in place as distinguished from surface digging or washing : underground mining in rock
Quartz mines. Victoria Quartz mine, Bendigo, Victoria, Australia (Its deepest shaft used to mine a quartz reef was almost a kilometre and a half deep.) Central Deborah gold mine, Bendigo (The mine still stands today. Mining began in 1938, and was continuous for 16 years. It was a deep reef quartz goldmine.
Quartz Mining Arkansas is one of a small number of places in the world with enough quartz crystals to justify commercial mining . Though the amount of unmined quartz in the state is not yet known, Arkansas does have, in terms of both size and quality, some worldclass deposits of quartz.