Concrete egg is an egg-shaped vessel used to ferment or mature wine. It is commonly made from concrete, sometimes with an internal coating or lining, and is valued for its neutral flavour profile and distinctive shape. Producers use concrete eggs for white, rosé and red wines, as well as for skin-contact preparations.
The curved, egg-like shape has no corners and may encourage gentle movement of the wine as temperature and fermentation activity change. Some winemakers believe this natural circulation can keep fine lees suspended and contribute texture, although the effect depends on the vessel, fill level, temperature and fermentation conditions. The shape does not guarantee a particular flavour or texture.
Concrete can provide thermal stability and, depending on the construction, a limited degree of oxygen exchange. Unlike oak, it does not contribute vanilla, toast or wood tannin. The exact oxygen transmission depends on the concrete mix, wall thickness, lining and vessel design. Some concrete eggs are coated internally, while others are unlined.
Example: a producer may ferment Chenin Blanc, Sauvignon Blanc or a Rhône-style red in a concrete egg to develop texture while avoiding obvious oak flavour.
Concrete egg is a modern vessel made from concrete. Amphora generally refers to a clay or ceramic vessel, often inspired by ancient winemaking traditions. Oak barrels contribute wood-derived compounds and a different pattern of oxygen exchange. Each vessel can be used for fermentation or ageing, depending on the producer’s method.
Chef’s note: the vessel alone does not define the wine’s style. Grape variety, skin contact, lees management, fermentation and maturation time are equally important.
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