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Werdingite: (Mg,Fe)2Al14B4Si4O37
Comments: B&W PPL image of grandidierite-hercynite symplectite replacing werdingite (W), whereas adjacent kornerupine (K) appears unafected. (AmMin, v75:415). Location: Granulite facies of the Namaqualand metamorphic complex at Bok se Puts, Namaqualand, South Africa. Scale: Picture Size 3 mm. © American Mineralogist