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PRECIOUS STONES 207
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Morion .............Black rock crystal.
Moroxite ..'..........Bluish green.
Natrolite...........Limpid white.
Obsidian ............Green, yellow, blue, white, velvet-black to gray and brown, streaked brown, black, and yellow spotted.
Octahedrite.........Yellow, blue.
Olivine .............Yellow, olive-green, bright green.
Opal................White, yellow, brown, and red body,
containing prismatic colors.
Orthoclase .........Moonstone.
Pearl...............White, pink, yellow, brown, bronze,
blue, etc.
Pectolite........... White, pale, and dark green.
Peridot .............Light olive to yellow green.
Phenacite ..........Reddish yellow, brown, colorless.
Prehnite............Oily green.
Pyrite ..............Gray to yellowish black.
Pyrope..............Deep-red garnet.
Quartz :
Agate...........Nearly all colors.
Asteriated ......Gray, etc.
Aventurine .....Red and yellow, spangled.
Basanite........Velvet-black.
Beckite.........Similar to chalcedony.
Bloodstone......Deep green with red spots.
Cat's-Eye .......Gray and greenish gray.
Chalcedony.....Clouded white, yellow, brown, blue.
Chrysoprase.....Pale bluish or yellowish green.
Carnelian ......Yellow, brown, red.
Heliotrope......See Bloodstone.
Jasper ..........Red, yellow, brown, gray, and sometimes blue.
Onyx ...........Various in strata.
Plasma .........Various greens.
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