a. A transparent to translucent, purple to pale-violet variety of quartz
common as a semiprecious gemstone. The color results from a hole defect
associated with ferric iron substitution for silicon.
Syn:bishop's stone
b. A term applied to a deep-purple variety of corundum and to a pale
reddish-violet variety of beryl.
A color designation meaning violet to purplish, used as in amethystine
glass and amethystine sapphire.
A phenocrystalline variety of quartz colored purplish or bluish violet by
manganese. See also:lavendine
Amethyst crystal, from a geode, commonly possessing only the six (or
possibly three) rhombohedral terminal faces; generally with gradational
color, the best at the apex commonly grading to colorless at its base.
See:asbestos
Syn:asbestos
Also spelled amiantus.
a. Having the appearance of asbestos. Standard, 2
b. An olive-green, coarse, fibrous variety of asbestos.
Standard, 2
A stick, tied to the end of a rope, on which workers sit when being raised
or lowered in shafts. Hess
A tetragonal mineral, Ca2 (Be,Al)Si2 O7 (OH).H (sub
2) O ; in colorless crystals in Sweden.
One of a group of complex compounds formed by coordination of ammonia
molecules with metal ions. McGraw-Hill, 1
A red or scarlet earthy substance, probably a mixture of copper antimonate
and cinnabar; said to occur in some Chilean ore deposits.
A 17th and 18th century term for a sedimentary rock now called oolite.
Obsolete syn: ammonite.
An explosive used mainly for heavy quarry blasts in dry boreholes. It
consists of TNT, ammonium nitrate, and powdered aluminum. Nelson
A colorless, gaseous alkaline compound; NH3 ; lighter than air;
pungent smell and taste. Byproduct of gas and coke production. Used in
making fertilizers and explosives.
Dynamite in which part of the nitroglycerin is replaced by ammonium
nitrate; used in mining. See also:extra dynamite
An explosive of the gelatin-dynamite class containing ammonium nitrate.
Webster 3rd
See:gelatin dynamite
Ammonium nitrate, NH4 NO3 ; nitrammite. Also spelled ammonia
nitre. Spencer, 4
In the coke products industry, one who extracts ammonia from liquor for
use in producing ammonium sulfate by circulating substances through stills
and auxiliary equipment. Also called pump-and-still operator; byproducts
stillman. DOT
A trigonal mineral, (NH4 )Fe3 (SO4 )2 (OH)
6 ; alunite group. It occurs in pale yellow lumps of tabular grains
on the west side of the Kaibab fault, southern Utah.
NH4 Cl ; isometric; and colorless. When dissolved in water, it is
used as an electrolyte for some primary cells. Obtained as a byproduct in
gas manufacture. Used as a flux in soldering. Also called sal ammoniac.
Crispin