@charley18 Sorry that you are in this predicament , have your mother admitted and accepted that she made a mistake and would not be scammed again?
In my opinion , I would first settle the smaller value ones or the ones with interest due .
I believe when you start getting back the smaller ones , you and your sister will feel encouraged to settle the more valuable ones.
Now is the time your family to be fully focussed and tighten your monthly budget . Yes both of you holding the gold items instead or your mother is the correct way.
Do you have other close family members who might help out? or any close and kind friends or superiors who can lend you money without charging interest?
Don't apply for personal loans or cc yet , try to settle for a few months first . Never ever go to loansharks , this will cripple you for many more years.
Stay strong and take care.