There he was hiding in the kitchen the whole time, that crafty fellow! : )
My guess is that the soldiers of the Ipatiev House divvied up most items among themselves in the days after the murders as they were destroying evidence and fleeing the house. I also think there was alot to go around - there seemed to be an abundence of little gold Faberge cases, photos in expensive frames, trinkets - and that sort of thing. I mean, what was an everyday item for the Romanovs was something of incredible value to the Ekaterinburg soldiers (and anyone else, for that matter).
I also believe that Yurovsky overstates in his memoir and notes his "don't steal from the bodies" mantra, because when we discuss possible bias in his testimony - of which we generally find little - that is certainly an area where he might be motivated to fudge. Why? Because he was instructed to collect and send on whatever jewels he found to his superiors. He may not have wanted to admit to the Soviet the extent of pilfering that really took place, or at least he wanted to come across as having done everything he could to prevent it. In truth, once out at the mine and meadow he probably threatened and warned the men, but ultimately could do virtually nothing to control their thievery. In particular, the timing of his "jewelry meeting" on the night of the murder seems a little problematic to me; it seems the immediate urgency to bury the bodies under cover of darkness would have trumped all else.
Anyhow, I'm rambling...