One of the most spectacular discoveries made by the Geological Society "Spirifer" was the finding of excessively calcites twins in 2001, which quality was similar to the best world specimens (see photos here).

We are curently preparing article about this unusual specimen. We also just relised short movie aout this find, unfortunatelly it is avilable only in polish lenaguage version, but the text is not most important in this film.

Movie you can download here:  Calcites from Madagascar - video (12 min - 121 MB).

Calcite - multiply twinned, size 7 cm. Sambava, Northern Madagascar.

Photos by Jeff Scovill (www.scovilphoto.com).