Cobaltocalcite on plancheite

Dimensions: 6.1 x5.7 x 4.1cm
Provenance: Mashamba, Congo DRC
Cobaltocalcite crystal of 4cm,  bi finished,  perfect on its plancheite matrix. This kind of old piece, increasingly rare on the market, is very sought after, especially when this one  offers a beautiful contrast with a nice aestheticism.
  Dimensions without the acrylic base, which is supplied with the mineralogical specimen.
The mineral is not glued to the base (soft putty).