Grandeur Osetra Caviar (Large Grain 3.5mm eggs)Grandeur Osetra (acipenser gueldenstaedtii) is harvested from the oldest sturgeon broodstock. This means these fish are 18 22 years old, giving them their largest grain size, most similar to the famed Beluga Sturgeon. Minimum grain size is 3. 5 mm, and color varies from grey to gold to platinum. Caviar is one of our most important and beloved collections, and we are incredibly proud to carry a line of exquisite quality, sustainably produced offerings