Koltsovo (H4)

Name: Koltsovo
Location: Kaluga District, Russia;
TKW: 20.02 kg
Find: July, 2004
Classification: stone, H4, ordinary chondrite; S1, W1

[Sources:] eBay, Vasiliev Sergey

History: One stone weighing 20.02 kg was found by Svetlana Murashova and Stanislav Murashov while collecting mushrooms 2 km SSW of the Koltsovo village. The stone was located at the edge of a ploughed field and was probably removed there during cultivation. No other meteorite fragments were found in the field by Dr. Andrei Stanyukovich of Moscow.
Classification: (M. Nazarov, Vernad): chondrules of different types and their fragments are well defined; olivine, Fa_20.0, PMD 2.7%; pyroxene shows variable composition, Fs_5–24Wo_0.2–7.2, the mean, Fs_12.9Wo_1.2; shock stage S1; weathering grade W1.
Specimens: 2034 g and a thin section, Vernad; main mass with the finders.