Track how many ore blocks a player breaks - ignore those they mine using silk touch.
I'd love to track how many diamonds a player actually manages to dig out of the ground, but this statistic is currently not possible to determine with accuracy, as we can't distinguish between diamonds which have been mined vs diamonds which were merely dropped on the ground next to the player when a block of diamond ore is mined.
As the next-best-thing: Track how many ore blocks were mined when the player was not using the Silk Touch enchantment.
Installs the following scoreboards:
- oc_b_-_coal
- oc_b_-_copper
- oc_b_-_diamond
- oc_b_-_emerald
- oc_b_-_gold
- oc_b_-_iron
- oc_b_-_lapis
- oc_b_-_quartz
- oc_b_-_redstone
You'll probably want to display one of them, via (for example):
scoreboard objectives setdisplay list oc_b_-_diamond