Augite Granophyre specimens from Carrockfell, Keswick, Cumbira, UK. Typically, granphyres are a form of sub-volcanic and intrusive igneous rocks composed mainly of quartz and feldspars. The texture of the crystals is often described as granophyric, meaning the quartz and feldspar crystals are tight and interlocking. These particular specimens also contain small, dark green/black augite crystals which can be seen with the naked eye, but are best viewed under a hand lens.
The augite granophyre hand samples are sold in a card tray with a small information label.