I haven't bought a grill in quite some time. I picked up a cheap Brinkmann for $200 at Home Depot. There are no coals or lava rock with it. The description says and this is typed exact from the website:
Lava Rock/Heat Grate or Briquettes : Heat Grate
I think maybe the : was meant to be a /
Which [i]could [i] mean:
Lava Rock/Heat Grate or Briquettes/Heat Grate
And I take that as: I can either use lava rock with my heat grate or Briquettes with the heat grate. Make sense?