Specimen with green tabular crystals up to 8 mm on matrix of this rare mineral of St. Hilaire. Ex Sandro Maggia coll.
Formula :
Na2(Ti,Fe3+)Si4(O,F)11
System: tetragonal Hardness:6-7 Rarity:rare
Strunz id:8/F.34-10 -
SILICATES
Name origin: For the Greenland locality at Narss^arssuk (Narsarsuk).
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 Specimen weight:33 gr.
 Crystal size:Up to 8 mm wide
 Overall size: 55mm x 27 mm x 25 mm
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