Zacatecas azurites are very difficult to find on the market. They were never plentiful. They are distinguished by having unusually gemmy crystals that are transparent under good light - unlike the vast majority of azurites, which are opaque or nearly opaque. This specimen features a brushy knob of crystals that sticks up from the limonite matrix. Rare specimen of gorgeous gem crystals - azurite at its best form old Mexico workings!