LAMONT, KANSAS, MESOSIDERITE
From the Catalog of Meteorites by Monica Grady:
A 38.69 kg meteorite was found among stones in a fence row. Mineralogy (A.E. Rubin & J.T. Wasson, UCLA): olivine, Fa 28^; low-Ca pyroxene, Fs 21-39^ Wo 1.1-4.4^; pigeonite, Fs 32-39^ Wo 7-11^;plagioclase, Ab 7.3^ Or 0.37^; subgroup 3 mesosiderite. Oxygen isotopic composition, R.N. Clayton & T.K. Mayeda (1996).
A recent discovery that I had a hand in bringing to science, Lamont is rich in olivine. It may bridge the gap between the Lodranites and the normal mesosiderites. Further study of this unique find is underway, and much will be learned from it. Though beautiful, it has one flaw-- rusting from chlorides.
The following sample has been treated to minimize this problem, and now appears to be stable
A very fine fragment with exterior crust and a polished face. This is the "discovery" piece that I received in `1996 that resulted in this very interesting meteorite coming to light. Stable, it has exterior crust, and a polished face.@ $18 per/gram.
71.5 grams .$1,287.00