From the list of Tobolsk:

6. Tsar’s diamond emblem with big diamonds 8 carats 22,000

Alexandra Fyodorovna’s Order of Saint Andrew all details, as the wings and the crown are setted in diamonds with an 8 carat diamond as center.

„For Faith and Loyalty“ an crowned black double-headed eagle bearing a St. Andrew’s Cross with St. Andrew crucified upon it; on the arms of the saltire were the Latin letters ‚SAPR‘ (‚St. Andrew, Patron of Russia‘) The Tsarina wore it as a pendant on the collar above.