Gravel
Aggregate mix
Blocks
A much bigger block with a cavity/hole going through the center.
Chips
3/8" Chips. Very small stones
Bags
An empty small bag.
Regular sized blocks used for most building jobs.
Concrete block that weighs one tonne.
An empty big bag.
Quarry Products
2" clean medium sized stone
The bigger thicker blocks up from the 4"
Small empty heavy duty sand bag.
Regular 4" block with a 30 degree offset.