1-Calcite: scalenohedral crystal on quartz from Brazil.
2-Calcite: scalenohedral zoned crystals from Lombardia.(Italy).
3-Calcite: scalenohedral colorless crystals on quartz from Brazil.
4-Calcite: blue spar mass with vesuvianite from Monzoni-Trento (Italy).
5-Calcite: brown rhombohedral crystals on quartz from India.
6- Calcite: white rhombohedral crystals from Porretta-Bologna (Italy) .
7-Calcite: rhombohedral lenticular crystals on goethite from Toscana (Italy).
8-Calcite: colorless twin scalenohedral crystals with dolomite on quartz from Brasil.
Calcites 9-16
Ó Stefano Zizzi (1998)