Figure 2

Typical microstructural features of archaeological samples Bro-W (top) and Bro-B (bottom). Reflected light bright-field (R-BF) and transmitted light cross polarized (T-XP) optical and scanning electron microscopy (BSE). Shows pyroxene (Px), spinel (Sp), cordierite (Cd), quartz (Qz), feldspar (Fd), and zircon (Zc) as well as glass (Gs).