Mineralogical exhibition of Mátra Museum. Minerals of Mesozoic basalts – Sirok, Recsk.
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Transcript of Mineralogical exhibition of Mátra Museum. Minerals of Mesozoic basalts – Sirok, Recsk.
Mineralogical exhibition of Mátra Museum
Minerals of Mesozoic basalts – Sirok, Recsk
Minerals of Mesozoic basalts – Sirok, Recsk
1.
Native copper (Cu) and Calcite (CaCO3)
Native copper – Cu
Class: Native elementsSubclass: metallicCrystal system: cubicCharacteristic crystal form: octahedral, hexahedralHardness: 2,5 – 3Cleavage/Fracture: no cleavage/hooked fractureColour: light-rose to cupper-redStreak colour: redGlance: metallic lustre
Calcite – CaCO3
Class: Carbonates, NitratesCrystal system: trigonalCharacteristic crystal form: rombohedral, prismatic, tabularHardness: 3Cleavage/Fracture: excellent cleavage/conchoidal fractureColour: colourless, white, grey, brown, yellowStreak colour: whiteGlance: glassy, pearly lustre
Locality: Sirok
2.
Hematite (Fe2O3)
Hematite – Fe2O3
Class: Oxides and HidroxidesCrystal system: trigonalCharacteristic crystal form: tabular, dipyramidal, rombohedralHardness: 6 – 6,5Cleavage/Fracture: no cleavage/uneven, conchoidal fractureColour: red, grey, blackStreak colour: redGlance: metallic lustre to unglazedLocality: Recsk
Epidote (Ca2(Al,Fe3+)Al2[O∙OH∙SiO4∙Si2O7])
3.
Epidote – Ca2Al3[O*OH∙SiO4∙Si2O7]
Class: SilicatesSubclass: NesosilicatesCrystal system: monoclinicCharacteristic crystal form: prismatic, columnarHardness: 6Cleavage/Fracture: very good cleavage/uneven fractureColour: yellowish green, brownish green, greenish blackStreak colour: whiteGlance: glassy, resinouslustreLocality: Recsk
Laumontite (Ca4[Al8Si16O48]∙18H2O)
4.
Laumontite – CaAl2Si4O12∙4H2O
Class: SilicatesSubclass: NesosilicatesCrystal system: monoclinicCharacteristic crystal form: earthyHardness: 3.-3,5Cleavage/Fracture: good cleavage/uneven fractureColour: colourless, whiteStreak colour: colourless, whiteGlance: glassy, resinouslustreLocality: Recsk
5.
Calcite (CaCO3)
Calcite – CaCO3
Class: Carbonates, NitratesCrystal system: trigonalCharacteristic crystal form: rombohedral, prismatic, tabularHardness: 3Cleavage/Fracture: excellent cleavage/conchoidal fractureColour: colourless, white, grey, brown, yellowStreak colour: whiteGlance: glassy, pearly lustreLocality: Recsk