Blocks
A much bigger block with a cavity/hole going through the center.
Bags
An empty small bag.
Quarry Products
4" clean large stone
An empty big bag.
Regular 4" block with a 30 degree offset.
Regular 4" block with a 90 degree offset.
Gravel
Aggregate mix
2" clean medium sized stone
The bigger thicker blocks up from the 4"
Plastering sand
Regular sized blocks used for most building jobs.