resinous 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 — /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

• pitchstone — /pich stohn /, n. a glassy volcanic rock having a resinous luster and resembling hardened pitch. [1775 85; trans. of G Pechstein. See PITCH2, STONE] * * * ▪ natural glass       a volcanic glass with a conchoidal fracture (like glass), a resinous… …   Universalium

• Titanite — from Capelinha, thumb|300pxTitanite or sphene is a calcium titanium nesosilicate mineral, CaTiSiO5. Trace impurities of iron and aluminium are invariably present. Also commonly present are rare earth metals including cerium and… …   Wikipedia

• tachylyte — tachylitic /tak euh lit ik/, adj. /tak euh luyt /, n. Petrog. a black, glassy form of basalt, readily fusible and of a high luster. Also, tachylite. [1865 70; TACHY + LYTE2] * * * ▪ rock also spelled  tachylite        glassy igneous rocks low in… …   Universalium

• pitchstone — /ˈpɪtʃstoʊn/ (say pichstohn) noun a glassy igneous rock having a resinous lustre and resembling hardened pitch. {pitch2 (noun) + stone, translation of German Pechstein} …  

• sphalerite — /ˈsfæləraɪt / (say sfaluhruyt), /ˈsfeɪlə / (say sfayluh ) noun a very common mineral, zinc sulphide, ZnS, usually containing some iron and a little cadmium, occurring in yellow, brown, or black crystals or cleavable masses with resinous lustre,… …  

• Sulfide minerals — ▪ Table Sulfide minerals name colour lustre Mohs hardness specific gravity habit or form fracture or cleavage refractive indices or polished section data crystal system argentite blackish lead gray metallic 2–2 1/2 7.2–7.4 cubic or octahedral… …   Universalium

• Silicate minerals — ▪ Table Silicate minerals name colour lustre Mohs hardness specific gravity Tectosilicates (three dimensional networks) feldspar (for other examples, see feldspar) orthoclase flesh red, white to pale yellow, red, green vitreous 6–6½ 2.6… …   Universalium

• Sulfate minerals — ▪ Table Sulfate minerals name colour lustre Mohs hardness specific gravity alum colourless; white vitreous 2–2½ 1.8 alunite white; grayish, yellowish, reddish, reddish brown vitreous 3½–4 2.6–2.9 alunogen white; yellowish or reddish vitreous to… …   Universalium