Minerals of the Franklin Marble
franklin marble case
The Franklin Marble is a late Precambrian (900 Ma to 1 billion years) shallow sea carbonate sequence that was metamorphosed at high temperature (836o C) and moderate pressure (4 - 7 kilobars) during the Grenville Orogeny. It is exposed as a continuous band, about 20 miles long and up to 2 miles wide, from southern New York into northern New Jersey. In New Jersey, it hosts the well known Franklin and Sterling Hill zinc deposits where around 350 minerals species have been described.
spinel clintonite

corundum ilmenite
The minerals clintonite, edenite, fluoropargasite, and warwickite were described for the first time as species new to science from the classic Franklin Marble localities of Amity, Edenville and Warwick in Orange County, New York. These species, as well as, spinel, chondrodite, allanite, apatite, tourmaline and others, were the subject of many scientific mineralogical studies and now highlight many museum mineral collections worldwide.
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