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A popular name for pearly and opalescent microcline although some moonstone could be orthoclase, but data are few. Frequently improperly applied to peristerite variety of plagioclase. Antiperthite and anorthoclase may show schiller similar to moonstone and have been lumped together with true moonstone due to lack of a less generic name.
Visit gemdat.org for gemological information about Moonstone. Currently in public beta-test.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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Locality Updated: Mary Mine, Palmerston Township, Frontenac Co., Ontario, CanadaFrom Reiner Mielke, 9th Mar 2014 14:46:04