Physical
characteristics: vitreous
colourless, gree, blue, yellow, pink, etc.; a transparent or
translucent
mineral of different colors that consists of fluoride of calcium and
its
used as a flux and in the making of opalescent an opaque glasses.
Garnet
Physical
characteristics: aluminium
silicate; a brittle and more or less transparent usually red silicate
mineral
that has a vitreous luster.
Physical
characteristics: silicone
dioxide with impurities; an opaque cryptocrystalline quartz of any
several
colors - green chalcedony, blackish green, brownish, and sometimes red.
