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A name given to (1) a mixture of wollastonite, quartz, and feldspar from Edelfors, Sweden; (2) impure wollastonite from Giellebak, Sweden (called also gillebackit); and (3) impure laumontite, under the impression that they were new minerals. Syn: edelforsite
Source: Dictionary of Mining, Mineral, and Related Terms

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