spessartine

spessartine

gem
      manganese aluminum garnet that is a semiprecious gem when clear. Found combined with almandine, it ranges in colour from pale orange yellow, when nearly pure, to orange or deep red, when appreciable proportions of almandine are present. It is similar in colour to grossular, but, unlike that species, it is commonly transparent. Spessartine is rare and, therefore, seldom used in jewelry. It is ordinarily found in granite, felsic lavas, pegmatite veins, and metamorphic rocks, as in central India, Madagascar, and Silver Cliff, Colo., U.S. For details of chemistry and occurrence, see garnet.

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Universalium. 2010.

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Look at other dictionaries:

  • Spessartine — Catégorie IX : silicates[1] Spessartine Général …   Wikipédia en Français

  • Spessartine — from China General Category Nesosilicate Chemical formula …   Wikipedia

  • spessartine — ● spessartine ou spessartite nom féminin (de Spessart, nom propre) Grenat manganésifère, de couleur jaune orangé à brun orangé …   Encyclopédie Universelle

  • spessartine — (spè ssar ti n ) s. f. Espèce de grenat, ainsi nommée parce qu on la trouve dans la forêt du Spessart en Bavière. La spessartine est composée de silice, alumine, fer oxydulé et manganèse, LEGOARANT …   Dictionnaire de la Langue Française d'Émile Littré

  • spessartine — spesartinas statusas T sritis chemija apibrėžtis Mineralas. formulė Mn₃Al₂[SiO₄]₃ atitikmenys: angl. spessartine rus. спессартин …   Chemijos terminų aiškinamasis žodynas

  • spessartine — noun see spessartite …   New Collegiate Dictionary

  • spessartine — noun A neosilicate of manganese and aluminium having the garnet structure, with the chemical formula MnAl(SiO). Syn: spessartite …   Wiktionary

  • spessartine — spes·sart·ine …   English syllables

  • spessartine — noun see spessartite …   Useful english dictionary

  • Спессартин — Spessartine Не следует путать с Спессартит …   Википедия

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