Yellowish Stillwellie - (Ce) crystal measuring 3 mm wide, perched on quartz matrix with Polylithionite in association. (color change to oragey at daylight). Ex Sandro maggia collection.
Formula :
(Ce,La)3[B3O6/Si3O_9_]
System: trigonal Hardness:6.5 Rarity:rare
Strunz id:VIII/E.5-20 -
SILICATES
Name origin: For Dr. Frank Leslie Stillwell (1888{1963), Australian ore mineralogist, and its
predominant cerium content.
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 Specimen weight:18 gr.
 Crystal size:3 mm wide
 Overall size: 35mm x 27 mm x 18 mm
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