| Material | Zinc alloy | 
        
            |  | Copper, Zinc alloy, iron, stainless steel, aluminum, pewter, etc | 
        
            | Crafts/process | hard enamel / soft enamel  | 
        
            |   | soft enamel, real cloisonné, printing, engrave, photo etched, etc | 
        
            | surface | Plating gold / nickel | 
        
            |   | Plating: gold, nickel, bronze, matt-gold, antique gold, two-tone plated, etc Dye colors Aluminum Anodizing Original metal color | 
        
            | Back side | Sandblasted | 
        
            |   | Smooth, mesh, back letters, polishing, engrave, etc | 
        
            | attachment | butterfly clutch / safety pin 
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