A specimen containing lazurite crystals and phlogopite (visible under 275 nm), Koksha valley, Badakhshan, Afghanistan. The lazurite contains veins of a yellow fluorescent mineral under 365 nm. We performed an EDX analysis on the lazurite and the veins. The lazurite is confirmed as being "real" lazurite (contains enough sulphur in the S3 form (Sapozhnikov (2021)). The yellow veins are afghanite. Lazurite covering afghanite is well known since lazurite crystallizes in the latest stages of mineral formation (Chukanov (2020)). The afghanite also shows its typical emission spectrum.
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