EFR91AP1: Find of the year in 2022. Parallel growths of two phases of Calcite crystals, one of them with very well defined grey translucent crystals, with “windows” that allow an earlier phase, in this case a very acute scalenohedral crystal covered by a very shiny iridescent microcrystalline Chalcopyrite layer, to show through. An interesting novelty.
This specimen has been photographed and published in the magazine ‘Le Règne Minéral’ number 168/2022, page 16
Tonglüshan Mine, Edong, Daye, Huangshi Prefecture, Hubei Province  China (05/2022)

Specimen size: 8 × 7.4 × 5.6 cm = 3.15” × 2.91” × 2.20”

Main crystal size: 6.7 × 4.2 cm = 2.64” × 1.65”