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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.
Moon rocks on Earth come from four sources: those collected by six United States Apollo program crewed lunar landings from 1969 to 1972; those collected by three Soviet uncrewed Luna probes in the 1970s; those collected by the Chinese Lunar Exploration Program's uncrewed probes; and rocks that were ejected naturally from the lunar surface before falling to Earth as lunar meteorites.
Moonstone, one of June's modern birthstones, can appear to be almost clear at times, but is "prized for its blue to white adularescence," according to the International Gem Society.
Orthoclase, or orthoclase feldspar (endmember formula K Al Si 3 O 8), is an important tectosilicate mineral which forms igneous rock.The name is from the Ancient Greek for "straight fracture", because its two cleavage planes are at right angles to each other.
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.
The U.S. space agency's robotic OSIRIS-REx spacecraft in 2020 collected the samples from the near-Earth asteroid, a rocky remnant of a larger celestial body that had formed near the dawn o
A mineral grain from a meteorite preserved evidence that water was present on Mars 4.45 billion years ago, and it may have created hot springs habitable for life.
While the Apollo 17 Goodwill Moon rock presented to Cyprus was recovered, the Apollo 11 rock given to the country remains missing. [8]In his June 26, 2011 Op/Ed appearing in the Cyprus Mail entitled "Houston we have a problem: we didn't give Cyprus its moon rock", Joseph Gutheinz revealed that after NASA recovered the Cyprus Apollo 17 Goodwill Moon Rock over a year ago they failed to give the ...