Thank You for the answers!
It is a hard and dense wood, indeed.
I did know about the runny nose, but perhaps the effect of it can be reduced by covering it with waxes and such. I was more curious about how heat and merbau get along. Toxic smokes and all that. Doesn't seem to be too much information about it.
I'm probably going to lose the mineral deposits during finishing it up, but the deposits might leave behind some small interesting crevases. Also I got it from the guy who sold me leather dye. I'm from Estonia, and it's not that easy to get any hardwood. And it's my first time making a pipe, so I really don't complain about the grain. :D
Aaaaanyway, I ended up making a stem out of it. At the end of the day, the block was too narrow to comfortably fit the bowl. Going to make some bowls out of oak. They might contrast nicely. Might use the rest of the merbau for making a small pipe that is not for this forum.
And back into the depths of the garage I shall wonder.
Thank You and cheers!