Lots of things that cannot actually be divided are considered in divorce settlements. It's not practical, for example, to slice a painting down the middle so each party gets half. That does not stop the painting from being treaated as an asset and considered in the settlement.

It is not always necessary to assign a monetary value to marital assets. The concept is to divide them into two piles until all parties - spouses, lawyer(s) and/or mediator as applicable, court - are OK with the split. Reducing things to monetary terms can simplify the process, since it provides a rational basis for weighing a painting against an automobile or a stock certificate, but isn't required.