Superb, sharp and large proustite crystals in a composite cluster group! The colour is pure deep red gem when backlight from top to the very bottom of the specimen! Note that only a part of the crystals were backlight for this picture. Minor chipping is present on a side crystal, but the damage is easily forgivable considering the size, the impact and the historical importance of that specimen. Truly a masterpiece from this old German locale! Ex Hubert de Monmonier collection.