The Group 1B metals, Cu, Ag, and Au, are called coinage metals. What chemical properties make them especially suitable for making coins and jewelry?

Coinage metals -

The group 11 elements, i. e., Copper, Silver, Gold are called the coinage metals.

These metals are quite soft and can be easily molded to form coins. This property is called as the property of malleability.

And due its soft nature, it can easily be used to make jewelry,

Since, making jewels require the metal to be soft and flexible,

Hence, gold is suited the best for this.