A mixture of methyl acetate and acetone. Used as a solvent.
Crispin
A heavy liquid used for mineral separation (sp gr, 3.33); also for
refractive index determination (R.I.=1.74). CF:Clerici solution;
Sonstadt solution; Klein solution; bromoform.
Both capping and gossan. AGI
A pocket implement combining the uses of many instruments, such as
thermometer, level, plummet, and lens. Standard, 2
An international unit equal to 200 mg that had been adopted in most
European countries and in Japan when it was made the standard in the
United States in 1913. Abbrev.: M.C. and cm. See also:carat
Webster 3rd
Rock crystal (quartz).
Yellowish brown or greenish brown banded calcite. See also:onyx marble;
Gibraltar stone.
Turquoise from the central part of Baja California, Mexico.
A fire opal from Mexico.
A triclinic mineral, Ca2 B6 O6 (OH)10 .2H (sub
2) O ; forms prismatic, commonly tabular, crystals or is fibrous; an
alteration product of inyoite from Inyo County, CA.
An amorphous mineral, WO3 .2H2 O ; resinous; yellow brown.
A monoclinic mineral, AgSbS2 ; soft; metallic; in low-temperature
hydrothermal veins; an ore of silver.
A granite having miarolitic cavities; a textural modification of normal
granite. Johannsen
A chorismite having miarolitic cavities or remnants thereof; a variety of
ophthalmite. AGI
A term applied to small irregular cavities in igneous rocks, esp.
granites, into which small crystals of the rock-forming minerals protrude;
characteristic of, pertaining to, or occurring in such cavities. Also,
said of a rock containing such cavities. CF:drusy
A cavity of irregular shape in certain plutonic rocks. Crystals of the
rock constituents sometimes project into the cavity. CF:druse; vug.
Schieferdecker
A mixture of strontianite and calcite. Hey, 1
a. A group of phyllosilicate minerals having the general composition, X
2 Y4-6 Z8 O20 (OH,F) where X=(Ba,Ca,Cs,H (sub
3) O,K,Na,NH4 ), Y=(Al,Cr,Fe,Li,Mg,Mn,V,Zn), and Z=(Al,Be,Fe,Si);
may be monoclinic, pseudohexagonal or pseudo-orthorhombic; soft; perfect
basal (micaceous) cleavage yielding tough, elastic flakes and sheets;
colorless, white, yellow, green, brown, or black; excellent electrical and
thermal insulators (isinglass); common rock-forming minerals in igneous,
metamorphic, and sedimentary rocks. See also:brittle mica
Syn:glimmer; isinglass.
b. The mineral group anandite, annite, biotite, bityite, celadonite,
chernykhite, clintonite, ephesite, ferri-annite, glauconite, hendricksite,
kinoshitalite, lepidolite, margarite, masutomilite, montdorite, muscovite,
nanpingite, norrishite, paragonite, phlogopite, polylithionite,
preiswerkite, roscoelite, siderophyllite, sodium phlogopite, taeniolite,
tobelite, wonesite, and zinnwaldite.
a. Consisting of or containing mica; e.g., a micaceous sediment.
b. Resembling mica; i.e., thinly foliated.
Hematite in which the texture is foliated or micaceous; some micaceous
varieties are soft and unctuous. Rice, 1
A sandstone containing conspicuous layers or flakes of mica, usually
muscovite. Syn:metaxite