Keywords: Kombination orthodiagonales Pinakoid - Hemitropie -Gips.svg Kryształ gipsu - schemat The gypsum crystal - schema vector image based on scan from a book of creation of the vector version 2 May 2006 of the vector version Stanisław Skowron Image Kombination orthodiagonales Pinakoid - Hemitropie -Gips png PD-Meyers Gypsum Twinned crystals |