TMP96XXX: Rhombic Calcite crystals, one of them clearly dominant and doubly terminated, with a very aerial disposition, color zones that are darker on the pinacoidal terminations, on matrix and with a very intense and uniform yellowish-orange color, due to inclusions of iron oxides.

Taff’s Well Quarry lies in southern Wales, within the geological setting of the South Wales Coalfield. Here, thick Carboniferous limestone and sandstone packages have been quarried for construction materials. secondary mineralization, including Calcite and Baryte, occurs mainly in fractures and cavities formed by low-temperature hydrothermal processes linked to the late tectonic evolution of the basin.
Taff's Well Quarry, Cardiff Municipality, Cardiff  Wales / United Kingdom

Specimen size: 8.4 × 6.6 × 4.1 cm = 3.31” × 2.60” × 1.61”

Main crystal size: 4 × 3 cm = 1.57” × 1.18”