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Moonstone cabochon. The most common moonstone is of the orthoclase feldspar mineral adularia, named for an early mining site near Mt. Adular in Switzerland, now the town of St. Gotthard. [1] [better source needed] A solid solution of the plagioclase feldspar oligoclase +/− the potassium feldspar orthoclase also produces moonstone specimens.
Olivine basalt collected from the rim of Hadley Rille by the crew of Apollo 15. Moon rock or lunar rock is rock originating from Earth's Moon.This includes lunar material collected during the course of human exploration of the Moon, and rock that has been ejected naturally from the Moon's surface and landed on Earth as meteorites.
Lunar Sample 14321, better known as "Big Bertha", is a lunar sample containing an embedded Earth-origin meteorite collected on the 1971 Apollo 14 mission. It was found in the Fra Mauro region of the Moon. Big Bertha is the first discovered meteorite from Earth, and the embedded meteorite portion is the oldest known Earth rock.
Examples of 'Moon rocks' display. To the left, part of Massachusetts lunar sample display of Apollo 11.To the right, United Kingdom lunar sample display of Apollo 17 The lunar sample displays are two commemorative plaques consisting of small fragments of Moon specimen brought back by the astronauts of the Apollo 11 and Apollo 17 lunar missions.
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The optical effect of adularescence in moonstone is typically due to adularia. [7] The largest documented single crystal of orthoclase was found in the Ural Mountains in Russia. It measured around 10 m × 10 m × 0.4 m (33 ft × 33 ft × 1 ft) and weighed around 100 tonnes (110 short tons). [8]
The Genesis Rock (sample 15415) is a sample of Moon rock retrieved by Apollo 15 astronauts James Irwin and David Scott in 1971 during the second lunar EVA, at Spur crater on Earth's Moon. With a mass of c. 270 grams (4,200 grains), [ 1 ] it is currently stored at the Lunar Sample Laboratory Facility in Houston, Texas .
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