The colour of the caviar depends on the respective sturgeon species. While the pearls of the Beluga caviar have a light grey and anthracite colouring, the roe of the Siberian sturgeon is mostly greyish. The caviar eggs of the Russian Ossietra sturgeon, on the other hand, tend to be silver-grey to black with a slight golden sheen. In the case of hybrid caviar, the colour table ranges from gold to dark brown. A particularly exclusive caviar speciality is colour-selected caviar. The freshly harvested sturgeon roe is carefully sorted. Only eggs with the right colour are processed into these special caviars. The best-known caviar selections are Royal Black Caviar, Imperial Caviar and Almas Caviar.