Charoite : (K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4·~3H2O
Aegirine : NaFe3+Si2O6
9.4cm x 4.9cm x 1.7cm
Photo added to mindat.org
“Polished all around, this piece shows beautiful black aegirine crystals next to charoite. Specimen size 9.4 x 4.9 x 1.7 cm.
”
Christian Bracke - 21st August 2006
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