'Diamond' in the Bible

Like a diamond harder than rock I have made your brow: have no fear of them and do not be overcome by their looks, for they are an uncontrolled people.

You were in Eden, the garden of God; every stone of great price was your clothing, the sardius, the topaz, and the diamond, the beryl, the onyx, and the jasper, the emerald and the carbuncle: your store-houses were full of gold, and things of great price were in you; in the day when you were made they were got ready.