In a New York Times article, April 1921, on the death and funeral of Kaiserin Augusta, it states "For though the Emperor insisted upon the utmost simplicity on her part in his home, yet for her court appearances he desired her to outshine all other women. To this end, he helped to provide her with nearly $2,000,000. worth of jewels, a collection second only to that of the Czarina."
If this is true, it will be very interesting to research her collection as it compares to that of the Romanovs and Windsors. William actually designed some of her pieces himself.