euhedral
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Euhedral — crystals are those that are well formed with sharp, easily recognized faces. Normally, crystals do not form smooth faces or sharp crystal outlines. Many crystals grow from cooling liquid magma. As magma cools, the crystals grow and eventually… … Wikipedia
euhedral — adjective Having sharp, recognisable crystal faces … Wiktionary
euhedral — eu|he|dral <Adj.> [zu griech. eũ = gut, wohl u. hédra = Sitz; Grundlage]: idiomorph … Universal-Lexikon
euhedral — eu|he|dral* <zu gr. eúhedros »gut, fest sitzend« u. 1↑...al> svw. ↑idiomorph … Das große Fremdwörterbuch
euhedral — [ju: hi:dr(ə)l] adjective Geology (of a mineral crystal) having faces corresponding to its regular crystal form, not constrained by adjacent minerals … English new terms dictionary
euhedral — eu·he·dral … English syllables
euhedral — (ˈ)yü|hēdrəl adjective Etymology: eu + hedral : idiomorphic … Useful english dictionary
igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary … Universalium
Rock microstructure — includes the texture of a rock and the small scale rock structures. The words texture and microstructure are interchangeable, with the latter preferred in modern geological literature. However, texture is still acceptable because it is a useful… … Wikipedia
Lamprophyre — Lamprophyres (Greek λαµπρός (lamprós) = bright and φύρω (phýro) = to mix) are uncommon, small volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, laccoliths, stocks and small intrusions. They are alkaline silica… … Wikipedia
