Koltsovo Kaluga district, Russia Found 2004, July Ordinary chondrite (H4) 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 occurred at the edge of a ploughed field and was probably removed there during agriculture works. No other meteorite fragments were found in the field by Dr. Andrei .Stanyukovich of Moscow. Classification and mineralogy (M.Nazarov, Vernad): chondrules of different types and their fragments are well defined; olivine, Fa20.0, PMD 2.7%; pyroxene shows variable composition, Fs5-24Wo0.2-7.2, the mean, Fs12.9Wo1.2; shock stage S1; weathering grade W1. Specimens: 2034 g and a thin section, Vernad; main mass with the finders. Data from: MB89 Table 8 Line 4: State/Prov/County: Kaluga District Date: Jul 2004 Latitude: 54°45.03'N Longitude: 36°58.68'E Mass (g): 20.02 kg Pieces: 1 Class: H4 Shock stage: S1 Weathering grade: W1 Fayalite (mol%): 20 Ferrosilite (mol%): 5-24 Wollastonite (mol%): 0.2-7.2 Classifier: M. Nazarov, Vernad