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Dumortierite - Dehesa, San Diego Co., California, USA
(#:MINS8101)
Cluster of violet Dumortierite xls in also in radiating formation up to 1,2 cm long set on matrix.
Formula :
Al
7
[O
3
/BO
3
/(SiO
4
)
3
]
System:
orthorhombic
Hardness:
8½
Rarity:
not common
Strunz id:VIII/B.31-20 - SILICATES
Name origin:
Named in honour of the French palaeontologist Eugène Dumortier (1801-1876) from Lyon.
Specimen weight:81 gr.
Crystal size:Up to 1,2 cm
Overall size: 60mm x 43 mm x 25 mm
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