Moissanite ornament and method for coating diamond film on surface of moissanite ornament

A method for coating a diamond film on a surface of a moissanite ornament, comprising

• Step 1:
• performing ultrasonic grinding pretreatment on the moissanite ornament in the in a nano-diamond powder suspension;
• Step 2:
• taking the moissanite ornament out from the nano-diamond powder suspension, and washing clean;
• Step 3:
• pressing the moissanite ornament into a preset shape-preserving sample platform to maintain;
• Step 4:
• placing the moissanite ornament together with the shape-preserving sample platform into a diamond film deposition furnace to perform a plasma treatment;
• Step 5:
• introducing methane to conduct in-situ diamond film deposition;
• wherein the ultrasonic grinding pretreatment time is from 2 h to 6 h;
• a material of the shape-preserving sample platform in step 3 is pure copper;
• and
• the plasma treatment in step 4 employs direct current arc plasma jet or microwave plasma jet to remove an influence of organic roots on deposition of diamond film, in which the organic roots is derived from the nano-diamond powder suspension on the surface of moissanite ornament.