Ok I just found second farmable that can become new role model
Dwarven Background ( 4 hits with pick, grow 1 day, drop gems 0 - 11 )
Director's Chair ( 6 hit with pick, grow like lgrid, drop gems 0 - 17)
Blackrock wall ( not worth because price is to cheap)
Marble block ( 6 hit with pick, grow just like paper , drop gems 0 - 12)
Refrigerator ( not farmable )
Roshambo block ( 8 hits, grow 4 day, drop gems 0-18)
Space connector ( not worth because to cheap)
Starship floor grill ( 5 hit with pick, grow 1 day and 3 hour, drop gems 0 - 13)
That's all that I think people would like to farm with many drop gems, many block that I don't put in the list because drop gems is to small like writing desk, if you think I should put it just comment it!!