Invaluable. To say something is invaluable means it has extreme value, that it's indispensable. Like a wedding ring. Where as a $100 bill is valuable but it's also replaceable. However we don't usually use the word invaluable to refer to something like a wedding ring. examples of the usage of invaluable would be: It was an invaluable clue that cracked the case wide open. The spy was an invaluable source of information.

When talking about "value", you have to consider the literal meanings of words. Invaluable is used to describe something "more precious", as you say. Valuable is most like "pricey", something that has a high material cost or usefulness. Invaluable is most like "priceless", you are saying that the item is so precious, you cannot put a material value on it. Invaluable is normally used within the English language to describe immaterial things, such as friendship, knowledge, or even good answers to questions. Hope this helped!

Valuable means something of worth. Invaluable means something isnt really that precious.