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RM3439 Hercynite, var. picotite
Sample formed by several crystals of hercynite, var. picotite, a Mg, Cr rich member of spinel group: (Fe,Mg)(Al,Cr)₂O₄. Collected by Hal Miller in the 1960s, via Dave Shannon. Similar samples discussed in mindat. 1d4u6t
Size: 5.4 x 4.4 x 3.4 cm.
Found in ±1960.
Col. H. Miller (USA). Col. E. Nicolau (Barcelona).
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