Valued customer = customer that is benificial and meaningul to the business Valuable customer = customer that is more critical for the business Valuable merchandise = high priced or cherished items Valued merchandise = items that have a price

In your sentence, the word "valued" means "appreciated" or "highly esteemed". In other words, the person is respected by others as a member of the team. The word "valuable" refers to financial worth. For example, people say, "the car is valuable" or "the house is valuable". Hope this helps

Thank you. Well, lots of things to learn about English indeed.

I would say that context is the important factor regarding this question. As a general rule I would say "valued" refers to people and "valuable" to physical things. E.g) She is a valued member of the team That ring was valuable to her. Also tense will come into play here, when referring to the past I "valued" may be more commonly used. E.g) That ring was valued by her However it could also be phrased: that ring was valuable to her There is a subtle between the two that is hard to explain but I suppose is ironed out with familiarity and practice.