I’ve never been good at telling bric-a-brac from outright heirlooms. Houses aren’t like museums, where they plaster every item with a history and thereby a value. For a kid, the only way to find out if some gewgaw idling in the living room is precious is to break it. This will bring about a valuation of the item from your parents pronto, usually, in my experience, delivered in tears by her and by being frogmarched into lengthy exile by him.