glass porphyry
1Quartz-porphyry — Quartz porphyry, in petrology, is the name given to a group of hemi crystalline acid rocks containing porphyritic crystals of quartz in a fine grained matrix, usually of micro crystalline or felsitic structure. In specimens, the quartz appears as …
2Витрофир — общий термин для порфировых п., обладающих составом кварцевого порфира или ортофира и стекловатой основной массой. Геологический словарь: в 2 х томах. М.: Недра. Под редакцией К. Н. Паффенгольца и др.. 1978 …
3вітрофір — витрофир glass porphyry, vitrophyre *Vitrophyr збірна назва для склуватих г.п. Звичайно це кварцовий або ортоклазовий порфір зі склуватою основною масою. В. іноді використовують як активну мінеральну добавку до цементів …
4Pythagoras — of Samos redirects here. For the Samian statuary, see Pythagoras (sculptor). For other uses, see Pythagoras (disambiguation). Pythagoras (Πυθαγόρας) …
5Mosaics — • Includes information on the history and techniques Catholic Encyclopedia. Kevin Knight. 2006. Mosaics Mosaics † …
6mineral deposit — Introduction aggregate of a mineral in an unusually high concentration. About half of the known chemical elements (chemical element) possess some metallic (metal) properties. The term metal, however, is reserved for those chemical… …
7copper processing — Introduction use of smelting or leaching, usually followed by electrolytic refining or recovery, to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of copper and of its… …
8Monreale —   Comune   Comune di Monreale Interior of the Monreale C …
9Topkapı Palace — Infobox Historic building name = Topkapı Palace caption = Topkapı Palace from the Bosphorus map type = latitude = longitude = location town = Istanbul location country = Turkey architect = Mehmed II, Alaüddin, Davud Ağa, Mimar Sinan, Sarkis… …
10pitchstone — /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… …
