Coldworking with Loose Grit

[@laforza8]

Great tutorial...you covered everything I needed to know...really going to take my glass to a new more polished level....

[@glynesmewton7033]

Instead of sheet glass could I use marble?

[@BullseyeGlass]

Glynes, I don't think that marble would be a good choice as a work surface for loose grit lapping. It's extremely soft compared to the glass or the grit. Broadly speaking, marble (calcite) is around 3 on the Mohs scale while glass (quartzite) is more like 7 and silicon carbide grit is in the 9-10 range. The marble would wear down and 'dish' pretty quickly. Plus it's a lot more expensive than a piece of plain float glass.

[@glynesmewton7033]

@@BullseyeGlass thank you so much for the advice very much appreciated xxxx