vitreous lustre
1Lustre (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 …
2lustre — /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,… …
3Lustre — 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… …
4silica mineral — Any of the forms of silicon dioxide (SiO2), including quartz, tridymite, cristobalite, coesite, stishovite, melanophlogite, lechatelierite, and chalcedony. Various kinds of silica minerals have been produced synthetically. * * * Introduction… …
5Metatorbernite — Green platy crystals on granite. Specimen from Redruth, Cornwall, UK General Category Phosphate minerals …
6pitchstone — /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… …
7Siderite — is also the name of a type of iron meteorite. Siderite Siderite from Brasil General Category Carbonate mineral …
8Sapphirine — Indigo blue sapphirine crystal from Ft. Dauphin, Madagascar (size: 2.1 x 1.9 x 1.4 cm) General Category Silicate mineral …
9Childrenite — from Galileia, Minas Gerais, Brazil 2 cm across General Category Phosphate minerals …
10Herbertsmithite — Infobox mineral name = Herbertsmithite category = boxwidth = boxbgcolor = imagesize = caption = formula = ZnCu3(OH)6Cl2 molweight = color = Light green, blue green habit = system = Trigonal twinning = cleavage = Distinct to good fracture =… …
