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composed of finely interspersed crystals of the mineral lazurite with calcite or marble and pyrite
Multiple twinned gemmy alpine titanite sphene crystals with clinochlore on matrix
The bottom has been smoothed a bit and there are some matrix mineral remnants
From Cave in Rock
Fluorescent Calcite with Clear Quartz Crystals & Pyrite from Trepca Mine, Kosovo Feather agate cube composed of finely interspersed crystalsThis is a beautiful, natural crystal cluster with high Mn calcite, lustrous clear quartz crystals, and minor pyrite. From the famous Trepa Mine complex in the Trepa Valley in Kosovo. Size: 87 x 85 x 60 mm. 258 grams. This piece glows beautiful mangano calcite red orange under long wave ultraviolet light with a wavelength of 365 nanometers. PLEASE NOTE: A 390 nm light or a black light may not make this rock glow. A 365 nm long wave ultraviolet light
