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RM1321   Arfvedsonite with zircon and feldspar
NaNa2(Fe2+4Fe3+)Si8O22(OH)2

Group of prismatic arfvedsonite crystals, showing parallel growth, one of the predominant and elongated. With striated faces and polycrystalline terminal faces. Dark green color, near black, in a feldspar matrix with very small prismatic zircon orange crystals. 4t42b

Size: 8.5 x 6.8 x 5.5 cm.
Main crystal: 40 x 28 mm.
Found in 2011.
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