The Icon of the Imperial Family at Ekaterinburg

[Alan]

In the Cathedral on the Blood in Ekaterinburg is a framed icon of the Imperial Family. Its is on a stand.
Inside at the bottom are a number of items of jewellery -  anecklace, rings of various kinds - and a purple brooch.This made me wonder if the jewellery was from the Imperial Family - especially the purple brooch _  Alexandra's ?
Any thoughts or known facts?
Alan