from The Century Dictionary and Cyclopedia
- n. A variety of quartz of a milk-white color. Also called milky quartz.
Sorry, no etymologies found.
Scoriac rubble filled it in to a very great depth; and in the interstices of this rubble were embedded here and there rude blocks of greenstone, containing almond-shaped chalcedonies and agate and milk-quartz, with now and then a tiny water-worn spec which an experienced eye would have detected at once as the finest "riverstones."