calcite twinning

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• Calcite — A one inch Calcite Rhomb that shows the Double image refraction property. General Category Carbonate mineral …   Wikipedia

• calcite — calcitic /kal sit ik/, adj. /kal suyt/, n. one of the commonest minerals, calcium carbonate, CaCO3, found in a great variety of crystalline forms: a major constituent of limestone, marble, and chalk; calc spar. [1840 50; CALC + ITE1] * * * Most… …   Universalium

• Crystal twinning — Diagram of twinned crystals of Albite. On the more perfect cleavage, which is parallel to the basal plane (P), is a system of fine striations, parallel to the second cleavage (M). Crystal twinning occurs when two separate crystals share some of… …   Wikipedia

• Crystal habit — This article is about the descriptive term used in mineralogy. For the addictive drug, see crystal methamphetamine. Pyrite sun (or dollar) in laminated shale matrix. Between tightly spaced layers of shale, the aggregate was forced to grow in a… …   Wikipedia

• Dolomite — This article is about the rock and mineral. For other uses, see Dolomite (disambiguation). Dolomite Dolomite and magnesite – Spain General Cat …   Wikipedia

• Stilbite — from Kiui Island, Alaska, USA General Category Zeolite Chemical formul …   Wikipedia

• Paulingite — Infobox mineral name = Paulingite category = Zeolite Group boxwidth = boxbgcolor = imagesize = caption = formula = (K,Na,Ca)3 4(Si,Al)21O42 ·17 22H2O molweight = color = Colorless, light yellow, orange, red habit = typically as euhedral crystals… …   Wikipedia

• dolomite — dolomitic /dol euh mit ik/, adj. /doh leuh muyt , dol euh /, n. 1. a very common mineral, calcium magnesium carbonate, CaMg(CO3)2, occurring in crystals and in masses. 2. a rock consisting essentially or largely of this mineral. [1785 95; < F,… …   Universalium

• Aragonite — is a carbonate mineral, one of the two common, naturally occurring polymorphs of calcium carbonate, CaCO3. The other polymorph is the mineral calcite. Aragonite s crystal lattice differs from that of calcite, resulting in a different crystal… …   Wikipedia

• Nyerereite — General Category Carbonate mineral Chemical formula Na2Ca(CO3)2 Strunz classification 05.AC.10 …   Wikipedia

• Rhodochrosite — from Sweet Home Mine, Alma, Colorado, USA General Category Mineral species …   Wikipedia