Laura,
If something is worth doing,
it's worth being done poorly, said Chesterton. Here are my guesses:
I emended [blano] to 'blanco', [manitas] to
'manicas' and 'aurento' to 'aureato', and the result was,
For Mary: A white silk gown with
golden stars with sic [presuris?] of beads.
For Mary: Thirty bands of beads
on the sleeves.
For Mary: A crown of gilded
silver with gems with fourteen [pasetis?].