CUMBERLANDITE
This is kinda nice - I'm very happy to have bought a piece of this. It's the Official State Rock of Rhode Island!
Cumberlandite was formed over 1.5 Billion years ago when a small volcano erupted and 24 different minerals mixed together with molten rock and when it cooled formed a slightly magnetic rock that is iron rich. This rare ore deposit is world renown.
These extremely rare rocks were deemed sacred by the Nipmuck Indians and were used to make cannons, weapons and farm tools during the Revolutionary War. Cannons made of Cumberlandite were also used in the siege of Louisberg in 1745. It has been reported to be used as early as 1703, when it was mixed with iron ore from Cranston, Rhode Island. Because it has alot of titanium, which made it very costly and hard to smelt.
It is found only in one place in the entire world = Cumberland, R.I. 02864 on Iron Mine Hill.
![]() This is an extremely rare and unique stone and has significant historical and geological interest. Attraction to a magnet can be used for positive identification. This very special rock was originally named Rhodose but was renamed Cumberlandite in 1966 by the Rhode Island General Assembly because it is extremely rare and unique nature. It also has great geological and historical significance therefore it was officially adopted as the official state rock of Rhode Island in 1966 (Resolution #268). An ultrabasic igneous rock, transitional to peridotite, from Cumberland, Rhode Island. The rock is greenish black and shows a few white plagioclase crystals in a black granular groundmass. The microscope shows some labradorite, olivine, magnetite, ilmenite, and accessory spinel. The olivine forms nearly half the rock and is set in a matrix of the other minerals, 40 percent or more of the rock being ilmenite and magnetite.
Thanks to Mike Yaseen for the pictures, information and metaphysicals. You can help him by going to his site (HERE) and buying some of the rock he has for sale (this and different to this). All proceeds go to his son, Joshua's, college fund. |