Biodynamic. This cuvée derives its name from the greenish, metamorphic bedrock (amphibolite) that dominates the soils in which it is grown. Produced from vines aged between 35 and 40 years, this unique wine was vinified with only a short period on lees, as Jo Landron wanted to retain as much freshness and minerality as possible. Only minor doses of sulphur were used to block malolactic conversion. Bottling occurred early (in March), without filtration, to retain the earth-to-glass essence of the wine.