0-SEPA fine quartz separator

595# quartz vein

a quartz + kalifeldspath + silver(gold) assemblage

a slotted quartz tube

acoustic quartz

acoustic quartz delay line

Active powder quartz

Aeolian quartz

alpha quartz

altered quartz porphyry

amphibole-plagioclase-quartz barometry

Analogue quartz clocks

anisotropic crystal quartz

antimonial (auriferous) quartz-calcite vein

Antimony-gold quartz vein

Arenaceous Quartz

artificial quartz crystal

artifitical quartz

aspirated quartz-crystal thermometer

assembled quartz pressure sensor