The Colonnade Egg | The Royal Collection - Creator: Henrik Emanuel Wigström (1862-1923) (workmaster) Creation Date: 1910 Materials: Bowenite, four-colour gold, silver-gilt, platinum, guilloché enamel, rose diamonds. Commissioned by Tsar Nicholas II for Tsarina Alexandra Feodorovna, Easter 1910; confiscated by the provisional government, 1917; transferred to the Sovnarkom by 1922; Emmanuel Snowman; acquired by Queen Mary and given to King George V, 1931