Materials through the microscope: Sodium nitrate salt (left); altered volcanic glass in basalt (top); lime cement mortar with recrystallised calcite

By | Published October 20, 2010 | Full size is 567 × 503 pixels

Materials through the microscope: Sodium nitrate salt (left); altered volcanic glass in basalt (top); lime cement mortar with recrystallised calcite

Materials through the microscope: Sodium nitrate salt (left); altered volcanic glass in basalt (top); lime cement mortar with recrystallised calcite

Materials through the microscope: Sodium nitrate salt (left); altered volcanic glass in basalt (top); lime cement mortar with recrystallised calcite

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