Black magnesioferrite with a micro, waterclear, hexagonal or barrel shaped
crystal of
bromellite to about 0.3 mm on yellowish
calcite
Origin: Långban, Varmland, Sweden
Sample size: 18 x 9 x 10 mm
Black, very small octahedral magnesioferrite crystals to
0.5 mm embedded in matrix.
Origin: Simms Prospect, Lemhi Co., Idaho, United
States
Sample size: 5 x 2.5 x 3 cm
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