Trachyte (Bostonite Porphyry)
Rock Thin Sections
Classic North American Rock Thin Sections
Our finest thin sections have been a classroom standard for over 40 years. When purchased individually, each 27 x 46 mm slide is packaged as an Explano-Mount, with a study sheet, in a durable plastic sleeve. In addition, you can now order matching hand specimens for each thin section.