The seller says it's a "les latneuse green variation on a Belgian blue stone" (link). I'm hoping they're right, as a coticule/BBW hone is my grail.

Can't wait for it being delivered now.

Name:  s-l1600.jpg
Views: 316
Size:  44.1 KB
Name:  s-l1600.jpg
Views: 329
Size:  32.8 KB
Name:  s-l1600.jpg
Views: 307
Size:  36.5 KB