You should get all to do with as you see fit.
But without a specific will its up to your other siblings and you to bash out together, which won't be easy seeing as they have their eyes on what is rightfully yours.
Time is needed, but often you don't HAVE time, hence there's so many fallings out over possessions.
I have no advice, not regarding the legalities, and though its not 'just stuff' to you, it IS just stuff..... you're probably exhausted with grief, and you need to find a balance between fighting for what is yours and not allowing this to spoil your grieving. I'm so sorry for your loss, but I think, when my mum goes, its her recipes that will mean more to me. I'm sorry if that sounds odd, or like I'm telling you to give up something precious, I'm not, not yet at least, but I do think you need space to grieve and remember your mum without this being the biggest part of your 'headroom', so appeal to your siblings for a period of thought time before any decisions are made.
I have a dress ring that's worth tuppence, it was my Granny's, she loved it more than any of her precious jewellry, and so I love it more than anything else too. xxx
Igues, my attitude is that jewellry is nice, but recipes can't be lost or ruined, pawned or broken.... those smells resonate more than a ring, though I do see your point and understand your reluctance to give things away without time for serious thought.