Valuable and invaluable can be used as the opposite of each other; they also have different meanings. They are adjectives that can be used for people, items, traits, actions, relationships, and so on. Valuable is used for items that are expensive or items that cost a fortune, while invaluable is used for items that are too valuable and will be hard to add value to it.
An example of using valuable and invaluable as the opposite is. That employee adds value to the company that means he makes a positive contribution, and an Invaluable employee is one that adds no value to the company, which makes the company suffer losses.
An example of using invaluable to measure how valuable someone or something. My relationship with my family is too invaluable