✨ What makes Porphyry special?
- It preserves contrasting stages of crystallisation: larger crystals began growing before the surrounding melt became a much finer matrix.
- The name describes texture, not one recipe: Granite, Andesite, Rhyolite and Basalt can all develop porphyritic forms.
- Its crystals resemble a stone constellation: pale or dark phenocrysts may appear scattered like stars across red, purple, grey, green or brown groundmass.
