- Platinum is one of the rarest classifications on the caviar spectrum, with only 5% of the harvest technically qualifying for this designation. In addition to its distinctive color, Platinum Osetra must be of a certain size and quality, and is made from sustainably farm-raised Acipenser gueldenstaedtii, more commonly referred to as Osetra or Russian Sturgeon, a slightly smaller and more slowly maturing relative to the famed Beluga Sturgeon