Classifier Mesh Sizes » Aussie Sapphire - The Lapidary ...
Classifier Mesh Sizes . ... (use for final clean up of gold concentrates from black sand or for recovery of small gem stones) 1/12 inch mesh – good all around size. 1/20 inch – FINE MESH is about equal to window screen (use for final clean up of FINER gold from your black sand or for recovery of very small garnets and gemstones, etc.)