White hard decorative member

A method for manufacturing a white hard decorative member, the method comprising the steps of

• stacking, on a base material, an adherence layer composed of a lower oxide layer of an alloy combining a metal M1, a metal M2 and selectively, a metal M3;
• stacking, on said adherence layer, a gradient adherence layer composed of a reaction compound between an alloy combining a metal M4, a metal M5 and selectively, a metal M6 and a non-metal element selected from one member or two or more members of nitrogen, carbon and oxygen such that the non-metal element content in the reaction mixture constituting said gradient adherence layer is gradually increased in the thickness direction with distance from the substrate;
• stacking, on said gradient adherence layer, an abrasion-resistant layer composed of a reaction compound between an alloy combining a metal M7, a metal M8 and selectively, a metal M9 and a non-metal element selected from one member or two or more members of nitrogen, carbon and oxygen;
• and
• stacking, on said abrasion-resistant layer, a color-up gradient layer composed of a reaction compound between an alloy combining a metal M10, a metal M11 and a metal M12 and a non-metal element selected from one member or two or more members of nitrogen, carbon and oxygen such that the non-metal element content in the reaction compound constituting said color-up gradient layer is gradually decreased in the thickness direction distance from the substrate,
• wherein each of said metals M1, M4, M7 and M10 is selected from one or two of Mo and W,
• each of said metals M2, M5, M8 and M11 is selected from one or two of Nb and Ta, and
• each of said metals M3, M6, M9 and M12 is selected from one member or two or more members of Cr, Ti and Hf.