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0.372 grams.   CM2

TKW 338 grams. Fall not observed. Purchased at the Tucson Mineral Show, January 2015, from a Moroccan meteorite dealer

 

Cosimo writes:

Carbonaceous chondrites or C chondrites are a class of chondritic meteorites comprising at least 8 known groups and many ungrouped meteorites. They include some of the most primitive known meteorites. The C chondrites represent only a small proportion (4.6%) of meteorite falls.

The CM group takes its name from Mighei (Ukraine), but the most famous member is the extensively studied Murchison meteorite. Many falls of this type have been observed and CM chondrites are known to contain a rich mix of complex organic compounds such as amino-acids and purine/pyrimidine nucleobases. CM chondrite famous falls:

Murchison
Sutter's Mill

The CM meteorite Murchison has over 70 extraterrestrial amino acids and other compounds including carboxylic acids , hydroxy carboxylic acids, sulphonic and phosphonic acids, aliphatic, aromatic and polar hydrocarbons , fullerenes , heterocycles , carbonyl compounds, alcohols , amines and amides.

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