Last night before I started grinding.  Current project has 5 different stones (alright, 4 stones and one hard mineral block I found on the mountain above our place in Molina).  I include this photo to show how I get texture & variations of color.  It is definitely not smooth when I start.  Last night, I spent about 2 1/2 hours grinding and belt sanding.  Probably have an hour to go.  Still no guess’s?