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Comments: Exceptionally well-crystallized wine-colored pseudo-hexagonal crystal of phlogopite on white calcite.
Location: Kalu Khan, Badakhshan, Afghanistan.
Scale: 6 x 5.5 cm.
© Fabre Minerals
Phlogopite: KMg3(Si3Al)O10(F,OH)2 Serendibite: Ca2(Mg,Al)6(Si,Al,B)6O20
Comments: Blue serendibite, with golden colored phlogopite, in white marble.
Location: Near Johnsberg, Warren County, New York, USA.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
Phlogopite: KMg3(Si3Al)O10(F,OH)2 Lazurite: Na3Ca(Al3Si3O12)S
Comments: Gemmy brownish phlogopite crystals on blue lazurite (lapis) matrix with minor pyrite.
Location: Koksha Valley, Badakhshan Province, Afghanistan.
Scale: 10 x 11.5 cm.
© Kevin Ward