Reasons Why coins are coins made of metal? But not made with not tempered glass?

with higher values are often made of more expensive metal. Metals are hardwearing. They are difficult to break and won't break like stone or simply burn like wood. Metals are simple to shape and inexpensive to stamp.

Because metals and their alloys have the quality of being malleable, coins are produced from metals and their alloys. They won't crack as a result when they are pounded into a flat shape. Coins should be made from corrosion-resistant metals and alloys that are vivid in color. They ought to be tough and resistant to wear.