Djurleite and cerussite. Alderley Edge, Cheshire, Britain
Rhythmically banded djurleite (blue, centre) and cerussite (light grey, centre) infill void-space between detrital quartz grains (grey). Authigenic quartz overgrowths are visible giving euhedral terminations to the quartz (left centre). The junction between original elastic grains and their overgrowths is marked by a fine line of voids or 'dust' (top left, centre top right).
Polished thin section, plane polarized light, x 80, air