A microkernel implements all drivers as user-space programs, and implements core features like IPC in the kernel itself. A monolithic kernel, however, implements the drivers as a part of the kernel...
Fine bone china is more delicate than porcelain, with a warmer, translucent finish. It is typically more expensive than porcelain. Fine china is produced without the inclusion of bone ash from similar materials to porcelain.
These numbers can oftentimes help to identify the manufacturer and date. To tell the difference between porcelain and pottery (aside from the translucency test) run your finger over the unglazed footrim or bottom of the item, if it is porcelain it should have a glassy feel and be white in color.