pycnite
and karpholite. (3.) Wax-yellow; opal and wulfenite. (4.)
Honey-yellow; durk honey, fluor spar, and beryl. (5.) Lemon-yellow;
rind of ripe lemons, orpiment. (6.) Ochre-yellow; yellow-earth and
jasper. (7.) "Wine-yellow; Saxon and Brazilian topaz and fluor spar.
(8.) Cream-yellow or Isabella-yellow ; bole from Strigau, and compact
limestone. (9.) Orange-yellow, rind of the ripe orange, uran-ochre, and
some varieties of wulfenite.
1. Bed.—(1.)
Aurora, or morning-red; realgar. (2.) Hyacinth-red ; hyacinth or
zircon, and garnet. (3.) Tile-red ; fresh-burned bricks,
porcelain-jasper, and heulandite. (4.) Scarlet-red; light-red cinnabar.
(5.) Blood-red; blood, pyropo. (6.) Flosh-red; felspar and barytes.
(7.) Carmine-red; carmine, spinel, particularly in thin splinters. (S.)
Cochineal-red; cinnabar and certain garnets. (9.) Crimson-red; oriental
ruby and eryth-rine. (10.) Columbine-red; precious garnet. (11.)
liose-red; diallogite and rose-quartz. (12.) Peach-blossom red;
blossoms of the peach, red cobalt-ochre. (13.) Cherry-red; spinel,
kermes, and precious garnet. (14.) Brownish-red; reddle and
columnar-clay ironstone.
8. Brown.—(1.)
Reddish-brown; brown blende from the Hartz, and zircon. (2.)
Clove-brown ; the clove, rock-crystal, and axinite. (3.) Hair-brown;
wood-opal and limonite. (4.) Broccoli-brown; zircon. £5.)
Chestnut-brown ; Egyptian jasper. (6.) Yellowish-brown; iron flint and
jasper. (7.) Pinchbeck-brown; tarnished pinchbeck, mica. (8.)
Wood-brown; mountain wood and old rotten wood. (9.) Liver-brown; boiled
liver, common jasper. (10.) Blackish-brown; mineral pitch and brown
coal.
The
accidentally-colored minerals sometimes present two or more colors or
tints, even on a single, crystal; very remarkable examples occurring
in fluor spar, apatite, sapphire, amethyst, tourmaline, and cyanite.
This is still more common in compound minerals, on which the colors
are va riously arranged,in points, streaks, clouds, veins, stripes,
bands, or in brecciated and ruin-like forms.. Some minerals again
change their color from exposure to the light, the air, or damp.
Sometimes merely the surface is affected or tarnished, and then
appears covered as with a thin film, producing in some minerals, as
silver, arsenic, bismuth, only one color; in others, as copper pyrites,
haematite, stibine, and common coal, various or iridescent hues.
Occasionally the change pervades the whole mineral, the color some-• 5
