I don't know the name of this stone but i did a little research and it similir to Gowganda Conglomerate stone or japanese suiseki

The stone turn red if you try to smash or scratch it .

The inside may contain a red coloured stone .

It weighs more than the other stone with same size .

The stone weigh around 30kg .

It from malaysia .

If u know what stone this is and u are interested,

Just private message me .

Thank you