greasy lustre

См. также в других словарях:

• Lustre (mineralogy) — Lustre (or luster) is a description of the way light interacts with the surface of a crystal, rock, or mineral. The word lustre traces its origins back to the Latin word lux, meaning light , and generally implies radiance, gloss, or brilliance. A …   Wikipedia

• lustre — I. /ˈlʌstə / (say lustuh) noun 1. the state or quality of shining by reflecting light; glitter, glisten, sheen, or gloss: the lustre of satin. 2. some substance used to impart sheen or gloss. 3. radiant or luminous brightness; radiance. 4.… …  

• lustre — /lus teuhr/, n., v.t., v.i., lustred, lustring. Chiefly Brit. luster. * * * In mineralogy, the appearance of a mineral surface in terms of its light reflecting qualities. Lustre depends on a mineral s refractivity (see refraction), transparency,… …   Universalium

• Lustre — Luster Lus ter, Lustre Lus tre, n. [F. lustre; cf. It. lustro; both fr. L. lustrare to purify, go about (like the priests at the lustral sacrifice), traverse, survey, illuminate, fr. lustrum a purificatory sacrifice; perh. akin to E. loose. But… …   The Collaborative International Dictionary of English

• Descloizite — specimen from Berg Aukas (Berg Aukus), Namibia, 9.5 x 8.9 x 4.9 cm]] General Category Vanadate mineral …   Wikipedia

• Gehlenite — Infobox mineral name = Gehlenite category = , , boxwidth = boxbgcolor = imagesize = caption = formula = Ca2Al [AlSiO7] molweight = color = yellow brown, green grey, colourless habit = system = Tetragonal twinning = cleavage = Distinct/good… …   Wikipedia

• feldspathoid — /feld spa thoyd , fel /, Mineral. adj. 1. Also, feldspathoidal. of or pertaining to a group of minerals similar in chemical composition to certain feldspars except for a lower silica content. n. 2. a mineral of this group, as nepheline. [1895… …   Universalium

• pitchblende — /pich blend /, n. Mineral. a massive variety of uraninite, occurring in black pitchlike masses: a major ore of uranium and radium. [1760 70; half trans., half adoption of G Pechblende. See PITCH2, BLENDE] * * * Amorphous, dense, black, pitchy… …   Universalium

• uraninite — /yoo ran euh nuyt , ray neuh /, n. a mineral, probably originally uranium dioxide, UO2, but altered by radioactive decay, and usually containing uranium trioxide, lead, radium, and helium, occurring in several varieties, including pitchblende:… …   Universalium

• zincobotryogen — noun A soft hydrous sulfate mineral that forms bright orange red monoclinic prismatic crystals with a vitreous to greasy lustre …   Wiktionary

• gummite — /ˈgʌmaɪt/ (say gumuyt) noun a yellow to red alteration product of pitchblende, having a greasy lustre, and occurring in gum like masses; a minor ore of uranium …