Formula :
Mn22+[OH/B2O4(OH)]
System: monoclinic Hardness:3-3½ Rarity:rare
Strunz id:V/H.2-20 -
NITRATES, CARBONATES and BORATES
Name origin: Named after the type localities, which are both located in Sussex County, New Jersey, USA (location of the Franklin and Sterling Hill orebodies).
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