Black caviar was known in Russia long before oil ... Director of a caviar farm in Thailand, told RBTH. In 1913, the best whole-grain beluga caviar in the Russian empire cost 3 rubles and 20 ...

Caviar, made by salting ovaries removed from female sturgeon, is called “black diamonds.” Golden caviar comes only from albino sturgeon, which lack a melanin pigment due to a genetic mutation.