EF13AE0: Quartz (variety chalcedony) - Smara, Western Sahara 
Quartz (variety chalcedony)

Smara, Western Sahara   (2016)

Specimen size: 6.5 × 6.5 × 5.6 cm = 2.6ö × 2.6ö × 2.2ö
specimens/s_imagesAE0/Quartz_chalcedony-EF13AE0f.jpg