The present invention relates to a precipitated calcium carbonate having a content of bio-based carbon determined according to DIN EN 16640:2017 of at least 50 wt.-%, based on the total weight of carbon in the precipitated calcium carbonate, a process for the preparation of the precipitated calcium carbonate, a polymer formulation comprising the precipitated calcium carbonate, an article formed from the polymer formulation, a process for preparing the article as well as the use of the precipitated calcium carbonate in a polymer formulation