As it as I told from the beginning in my interrupted written conversation with Pedro where I said:
"it's not a necklace but a belt (to be wearer just below the bust line) or jeweled waistband; hence the heaviness of its structure and appearance". (Pedro spoke about the heavier who saw it as a necklace: "Curiously, the diamond & emerald necklace looks heavier")
The topic of the conversation was the current necklace and not where they put the big brooch (I had not noticed [my mistake!] the change of the subject (done by Boris) hitherto!).
I'm glad to confirm my words and thoughts in the present necklace matter and I'm also pleased that the Marshal were not John Wayne!.