Note 91 — MINERALS.
Reading edition
CALCEDONY is a species of quartz, generally of whitish, bluish, or smoke-grey colour; and, when broken, it appears internally dull, and somewhat splintery.
Reading edition
CALCEDONY is a species of quartz, generally of whitish, bluish, or smoke-grey colour; and, when broken, it appears internally dull, and somewhat splintery.