EG16AD7: A novelty at Sainte Marie-aux- Mines 2016. Very aerial arborescent growth, on a Calcite matrix, of “fresh” and bright crystals with their faces slightly deformed but well defined. No similar samples are known from this mine.
The specimen has been reviewed, photographed and published as a new discovery in the magazine ‘Mineralogical Record’ on page 751 in the volume 47, number 6 (November-December 2016)
Tamdrost Mine, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region  Morocco (01-02/2016)

Specimen size: 7.2 × 5.9 × 2.8 cm = 2.83” × 2.32” × 1.10”

Main crystal size: 0.6 × 0.5 cm = 0.24” × 0.20”