There are 10 presets. Effectiveness depends on light angle.
Adjust specular, gloss and color as you desire.
Update Version 2: Thanks to @VRDollz for the bump map idea then literally giving me the bump map to use.
I also fine tuned it with smaller speckles, gave it the prism color effect and added a few more options.
		
	
		
	
		
	
					
					
					
					
	
					
						
					
					
	
	
	
					
				Adjust specular, gloss and color as you desire.
Update Version 2: Thanks to @VRDollz for the bump map idea then literally giving me the bump map to use.
I also fine tuned it with smaller speckles, gave it the prism color effect and added a few more options.