拍品专文
There are currently less than 250 lunar meteorites known, but because many specimens break up in the atmosphere or on the ground, there are probably only about 120 separate lunar meteorites. None is an observed fall. Lunar meteorites are readily recognizable because they can be compared to the samples returned by the Apollo astronauts and three Soviet Luna missions. Many of the lunar meteorites were shocked when launched from the Moon’s surface. NWA 8022 is classified as a feldspathic breccia – a rock made out of numerous fragments enriched in calcium-aluminum silicate. Most of the minerals are very fine grained. The specimen was found in the Sahara as a single 1226-g stone with some residual brown fusion crust.