A hard thing to do--going through a moms or dads marbles--that is why I started to sell lately, to keep my wife and kids out of this hassle.
There are no instant results with marbles ID--many may claim it but each one takes some time to fully get it ID'd correctly.
Then it comes to the time to sell them—what a drag—selling marbles—one at a time trying to get it right.
I suggest either continuing this collection or selling it.
There are many here and from around the World that are willing to suggest a seller to you that I/we/her would trust.
Cut down on the stress from losing a loved one—and sell them—with advice from a promised collector.
I wish you and yours well.
Marble—On!!