Osietra Carat is a Swiss caviar by Oona, obtained from Russian sturgeon (Acipenser gueldenstaedtii) farmed in Frutigen in the Bernese Alps. It was introduced as the first Swiss caviar from this sturgeon species, with farming and processing taking place at the same location.

The sturgeon grow for nine to ten years in naturally warm mountain water before their roe is harvested. The caviar is lightly salted with additive-free Swiss rock salt, then matured in traditional tins to develop its distinctive aromatic profile.

It features fine, titanium-coloured grains with an olive sheen and pronounced freshness. The flavour is nutty, with subtle earthy notes, complemented by a delicate texture. It can be enjoyed on its own or served with lightly pan-fried blinis and a quark and dill sauce.