An invaluable resource is something that has an extremely high value, and is considered to be too important or useful to be measured. It can refer to anything from a person's knowledge or skills, to natural resources such as water or forests, to man-made objects like technology or tools. The term "invaluable" means that the resource cannot be assigned a monetary value because it is considered too important or irreplaceable to measure in terms of money. In other words, an invaluable resource is something that is beyond price and has immense worth.