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Blue spinel from Vietnam

Small but really nice specimen, consisting of blue spinel (bright red fluorescence under longwave UV), along with some unknowns, fluorescing respectively yellowish under midwave and shortwave, and bright blueish-white under shortwave, on feldspar (very dim reddish fl under SW); Lục Yên District, Yên Bái Province, Vietnam



24 mm X 18 mm X 11 mm



Shown below: longwave UV, midwave UV (310 nm LED), shortwave UV (255 nm LED), Visible light.




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