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Ankerite from Zillertal Alps, The Alps, Europe
GWT-WLNAnkerite Ca(Fe2+,Mg)(CO3)2
Ankerite (not analysed; might be Fe-bearing dolomite).
Widht of the piece : 18,5 cm
DRP-MMWAnkerite Ca(Fe2+,Mg)(CO3)2 , Rutile (Var: Sagenite (of Saussure)) TiO2 , Clinochlore (Var: Ripidolite) ? (Mg,Fe,Al)6(Si,Al)4O10(OH)8
Largest Crystal Size: 030 mm
Saddle shaped clusters of ankerite resting on white gneis matrix, scattered black ripidolite and upright standing sagenite with typical growth.
See second image of sagenite-ankerite close up.
Found 1983, cleft situated at meter 2.960.
Widht : 12,5 cm
V87-G6ACalcite CaCO3 , Ankerite Ca(Fe2+,Mg)(CO3)2 , Rutile TiO2
Translucent scalenohedral calcite crystals on cream coloured ankerite xx (not analysed), minor rutile needles.
Dimension : 14 cm wide
Locality : Elfriedestollen, Zillergründl, Ziller valley, Tirol, Austria
N5L-AL3Calcite ? CaCO3 , Ankerite ? Ca(Fe2+,Mg)(CO3)2
Widht of the piece : 10 cm
Brownish-yellow ankerite ( not analysed ) with white calcite.
WJU-AYKCalcite CaCO3 , Ankerite Ca(Fe2+,Mg)(CO3)2
White translucent scalenohedral calcite crystals, doubly terminated,
size of the individual x up to 3,5 cm, sprinkled on a bed of yellow-brownished ankerite crystals. Liberally small rutile needles are present.
Overall size : 9 x 5 cm
F8R-A5CRutile TiO2 , Ankerite Ca(Fe2+,Mg)(CO3)2 , Clinochlore (Var: Ripidolite) ? (Mg,Fe,Al)6(Si,Al)4O10(OH)8
Fine sparkling black rutile needles are scattered above saddle shaphed yellow-browished ankerite crystals and black rhipidolite, all are resting on crusty white-grey adularia.
A real fine piece in excellent conditions.
Widht : 8,5 cm