glossary of terms f
in a quartz matrix. Quarried in Mexico. Agate A variegated, translucent, cryptocrystalline variety of quartz showing colored bands or other markings (clouded, mosslike, etc.). Agglomerated Stone A manmade product composed of crushed stone combined with resin. See also engineered stone and cultured stone. Aggregate A small mass of rock, having occurred naturally (as in sand or gravel) or by ...