dachs_001. Dacite sample from near Helena, MT, containing plagioclase and hornblende phencrysts. The visible sample is about 6x9 cm. University of North Dakota sample. Photograph by Dexter Perkins and students. To see a zoomable, 3D image of this sample click here.

dachs_002. Dacite sample from Romania. The long dimension is approximately 11 cm. Image from the The Museum of Mineralogy and Petrography Grigore Cobalcescu on Sketchfab.

dachs_003. Dacite sample from Lassen Peak, California, USA. Plagioclase, hornblende, biotite, and quartz are visible. Cenitmeter scale. US Geological Survey Study Collection, Hamilton College (USGS-82). To see the original, zoomable image on ArtStor click here.