A style of diamond cutting, usually of Indian or other Oriental origin, in
which the table is usually double the size of the culet; such stones are
generally recut for European or American requirements. Hess
Aventurine quartz containing inclusions of chromian muscovite.
Syn:regal jade
An Indian's right to occupancy of land, and that right recognized by the
United States, constitutes Indian title. Ricketts
A fine natural steel from southern India made directly from the ore;
wootz.
Ore for which tonnage and grade are computed from information similar to
that used for measured resources, but the sites for inspection,
measurement, and sampling are farther apart or otherwise less adequately
spaced. The degree of assurance is high enough to assume continuity
between points of observation. USGS, 2
Resources from which the quantity and grade and/or quality are computed
from information similar to that used for measured resources, but the
sites for inspection, sampling, and measurement are farther apart or are
otherwise less adequately spaced. The degree of assurance, although lower
than that for measured resources, is high enough to assume continuity
between points of observation. USGS, 2
a. A geologic or other feature that suggests the presence of a mineral
deposit, such as a geochemical anomaly, a carbonaceous shale indicative of
coal, or a pyrite-bearing bed that may lead to gold ore at its
intersection with a quartz vein. A plant or animal peculiar to a specific
environment, which can therefore be used to identify that environment.
See also:pencil mark
b. See:marker bed; marker. Long
a. Some plants develop peculiar diagnostic symptoms that can be
interpreted directly in terms of probable excesses of a particular element
in the soil. Geobotanical indicators are either plant species or
characteristic variations in the growth habits of plant species that are
restricted in their distribution to rocks or soils of definite physical or
chemical properties. They have been used in locating and mapping ground
water, saline deposits, hydrocarbons, and rock types, as well as ores.
Hawkes, 2
b. A plant whose occurrence is broadly indicative of the soil of an area;
e.g., its salinity or alkalinity, level of zone of saturation, and other
soil conditions. AGI
A vein that is not metalliferous itself, but may lead to an ore deposit.
The numbers that define the position of a crystal face in space with
reference to crystallographic axes. Miller and Bravais-Miller indices,
those in current use, are the reciprocals, cleared of fractions, of the
intercepts the face makes with the crystallographic axes.
Syn:Miller indices
A blue variety of elbaite tourmaline.
Sulfide-derived limonite that remains fixed at the site of the parent
sulfide, often as boxworks or other encrustation. CF:exotic limonite;
relief limonite. AGI
See:covellite; copper sulfide.
Flushing in which the water enters the borehole around the rod and issues
upwards through the rod. Stoces
Placement of the blasting cap in the first cartridge going into the
borehole with the business end pointing toward the collar. Recommended
method of priming charges of permissible dynamite.
An isometric mineral, FeIn2 S4 ; linnaeite group; in minute
iron-black grains in cassiterite from the Dzhalind deposit, Little Khingan
ridge, the former U.S.S.R.
a. A tetragonal mineral. Symbol, In; native; metallic silvery white; sp
gr, 7.31; in meteorites and as a trace constituent in the minerals of
other metals, principally zinc, lead, tin, tungsten, and iron minerals;
principal source is sphalerite concentrates that may contain up to 10,000
ppm.
b. Used in making bearing alloys, germanium transistors, rectifiers,
thermistors, and photoconductors. Handbook of Chemistry and Physics, 3
individually screened trailing cable
A trailing cable with a screen of metallic covering over each power
conductor. This is the type now adopted in British coal mines.
See also:trailing cable
In crushing practice, this term may be expressed as: Size most abundant in
feed/mean size of grading band concerned. South Australia
Beams that catch the walking beam of the Cornish pump or engine on its
down piston stroke if the string of tools being moved should break. The
indoor stroke is the lifting stroke of such a pump. Pryor, 3