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Ludwigite - Zebrų Valley, Valfurva, Sondrio Province, Lombardy, Italy (#:MINS9176)

Specimen rich of black tufts of ludwigite in acicular and bright crystals up to 3 mm. A rare alpine find.

Formula :
Na4K4(Ba,K)2Fe2+(Ti,Nb)8Z(Si4O12)4(O,OH)8·10H2O
System: monoclinic Hardness:6 Rarity:rare
Strunz id:VIII/E.7-100 - 8 : Silicates
Name origin: Named after the Russian mineralogists Aleksander Nikolaevich Labuntsov and Ekaterina Eutiikkieva Labuntsov-Kostyleva.

Specimen weight:77 gr.
Crystal size:3 mm
Overall size: 78mm x 40 mm x 26 mm

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Ludwigite - Zebrų Valley, Valfurva, Sondrio Province, Lombardy, Italy

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