Actually, I have answered your question. A property intrinsic to an object and observable can be measured. Other objective properties of an object can be measured accurately (height, weight, color). In other words I can objectively quantify these properties. How do I objectively quanitfy worth or value? I have also pointed out that worth and value of an object appear to change depending upon the observer (what you might find valuable I might consider crap). This is the definition of subjective. You will not find observations of height or weight or color differing from one observer to another, meaning these are intrinsic to the object and hence objective.
Yawn. You did not answer. You need to prove empiricism empirically. You haven't done that. How do you prove that all reality is measurable? You would have to be all knowing to know that all reality is measurable because you would have to be aware of all things. Indeed, you would have to be God to prove it. And you, sir, are not God.