An outcrop of blocks of sandstone and beds of crystalline calcite in the vicinity of a copper deposit.
This iron rich formation spanned approximately 70 metres, exposed in various states. The most prominent outcrop was silicified, with breccia and broken veins of hematite and quartz, indicating hydrothermal deposition and fault disturbance.
Step 1. Grind up mineral-rich rocks found in the area, including Hematite, Galena and earthy Malachite and Azurite.
Step 2. Smelting. To smelt iron oxide, charcoal was used to covert the oxygen into carbon dioxide, leaving iron. To smelt galena, lead sulphide, heat alone released the sulphur, leaving lead (seen below).
Magnification 20x. Continue reading “Dihydrogen Monoxide crystals, also known as frost”
Leigh Creek Library has an excellent range of field guides including the following titles.
Schistose rocky outcrop.
Mica schist and tourmaline.