ordinary chondrites

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Most (>95%) stony meteorites are ordinary chondrites. Below are some photos of sawn faces of ordinary chondrites. For most of the photos, clicking on the image will bring an enlargement. The brightest materials in each photo are metal grains (veins in "Richarton"). Ordinary chondrites contain iron-nickel metal and, consequently, will attract even a cheap magnet.

Identified as "Richarton, ILL." but probably Richardton H5 (North Dakota, fall, 1918). In the closeup on the right,
saw marks are visible in the metal vein. Notice that the metal grains are typically less than 1 millimeter in size.

Allegan H5 (Michigan, fall, 1899)

Mocs L6 (Romania, fall, 1882). In the closeup on the right, saw marks are visible in the metal grains.

Bjurböle L/LL4 (Finland, fall, 1899)

Two views of a sawn slice of Independence L6 (Missouri, fall, 1917), with electronic flash lighting (LEFT, with millimeter ticks on scale) and natural sunlight (RIGHT). Click on image for enlargement. Thanks to Karl Aston for the sample.

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*See the density web page for a tabulation of the relative abundance of different kinds of meteorites.

Prepared by:

Randy L. Korotev

Department of Earth and Planetary Sciences
Washington University in St. Louis

Please don't contact me about the meteorite you think you’ve found until you read this and this.