On Friday, September 8, 2017 at 7:51:28 PM UTC-4, Bob La Londe wrote:

Will a standard star wheel dressing tool square up a green stone when it
gets worn?

I would go to AliExpress and get a diamond dressing tool. I just looked and there are some for less than $2 including shipping.

Not sure if a standard star dressing tool will work, it probably will but a diamond dressing tool is cheap. ( well not at MSC. )

Dan