Hermes Sandpaper WS FLEX 16 180 Grit Silicone Carbide Abrasive Sheets.

230mm x 280mm sheets (9inch x 11inch) 

This is the sandpaper that I use and recommend for sanding opal and ironstone. 

The WS Flex 16 sandpaper gives a beautiful, consistent finish on the surface 
and outlasts all the other sandpapers that I have tested.

The opal surface can be pre-formed using aggressive diamond tools, 
then use 180, 240 or 320 grit to do the medium sanding 
and the 400, 600 or 800 grit to do the fine sanding/pre-polish.

Buy in bulk and save.

Single sheet $2.50
5 sheet pack $12.00
10 sheet pack $20.00
25 sheet pack $45.00
50 sheet pack $80.00
100 sheet pack $150.00