Roman Abramovich’s Château de la Croë in Antibes, France. Gamma-Rapho via Getty Images The frozen properties, worth nearly $1 billion, include Roman Abramovich’s château on the French Riviera and his estate in St. Barts. On Wednesday, French authorities published a list of 41 properties owned by sanctioned Russian individuals that had been frozen since Russia’s invasion of Ukraine, worth nearly $620 million. Forbes found that 31 of those properties are owned by eight sanctioned Russian billionaires, including Roman Abramovich’s $250 million Château de la Croë in Antibes on the French Riviera and his $90 million estate on the luxe Caribbean island of St. Barts. Forbes estimates the 31 billionaire-owned properties…