CM Group

This group is named for its type specimen, the meteorite of Mighei, which fell in Ukraine in 1889, and it has many more members than the previous group. About 80 chondrites of the CM group are known, and they mostly belong to petrologic type 2, although certain lithologies in some of its members are known to belong to type 1 (e.g. in Cold Bokkeveld). With about 10% water, they contain less than the CI chondrites and show less aqueous alteration so that some chondrules have been well preserved. Those chondrules consist of olivine and are scattered throughout the black matrix. In that mixture of phyllosilicate and magnetite, similar to the matrix of the CI chondrites, one also finds light-coloured inclusions. These high-temperature silicates are lacking in the CI group.

As with the CI chondrites, the CM chondrites are well known to contain a wealth of complex organic compounds. The well-studied meteorite of Murchison, a CM2 that fell in Australia in 1969, was found to contain more than 230 different amino acids, whereas on earth only 20 different amino acids are known and used as fundamental building blocks of life. Some of these extraterrestrial amino acids were found to exhibit strange isotopic signatures that might indicate that they don't have their origin within our solar system. These amino acids are believed to represent actual interstellar matter from other systems and nebulae that were trapped in this meteorite more than 4.5 billion years ago.

Murray CM2  fell: Sept. 20, 1950, Calloway County, Kentucky, USA TKW :12.6 kg
				Murray 00 53.35 gr incredible fusion crusted chunk, has a sliced face. The largest specimen available Worldwide. Price on request
Murray 01 12.17 gr  fusion crusted fragment, a very large specimen for advanced collection. SOLD
				Murray 02 18.74 gr dry sliced huge fragment. SOLD
Murray 03 1.697 gr dry sliced large fragment. SOLD
				Murray 04 1.462 gr dry sliced large fragment. SOLD
Murray 05 1.274 gr dry sliced large fragment. SOLD
				Murray 06 0.828 gr broken fragment. SOLD
Murray 07 0.698 gr broken fragment. Price on request
				Murray 08 0.565 gr broken fragment. SOLD
Murray 09 0.454 gr broken fragment. SOLD
				Murray 10 0.427 gr broken fragment. Price on request
Murray 11 0.374 gr broken fragment. SOLD
				Murray 12 0.314 gr broken fragments. SOLD
Murray 13 0.402 gr dry slicing dust, can be used for bulk analysis. SOLD