As a tool for cutting glass and drilling rocks, and also in making jewelry as it sparkles brightly.
Diamond in facial and diamond exfoliator is available these days. Beauty products have started including diamond dust and therefore the cost will definitely be high. Use of diamonds in beauty products is to reduce wrinkles etc.
They are used in jewelry (such as earrings, nose rings, engagement rings, pendants, etc.) due to their shiny luster and their durability. They are used in making jewelry because of their durability and luster property