Red Fluorescent Spinel, Yenbai Province, Vietnam

This specimen consists of raspberry red, octahedral spinel crystals in a white marble matrix, from the An Phu Marble Mine, Luc Yen, Yenbai Province, Vietnam. Under long wave UV, the spinel fluoresces deep, rich, red, and the marble matrix shows a moderate blue/white response. Not all red spinel is created equal in terms of fluorescence. Some fluoresces dimly, or not at all. This is a particularly bright fluorescing specimen. Size 36 x 32 x 24 mm, 25 grams.

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