Many pieces of different types of woods are used to construct a mosaic rosette.  In this case, these woods are spalted tamarind, lacewood, and red heart.   Small sheets are sanded to the same thickness and then cut into strips and the edges are sanded level.  Each piece is then glued together separated by a thin piece of black fiber, cut again, and then positioned such that a circular rosette can be cut out.   The design is random in this kind of rosette and so every one is unique.  This one will be used in an upcoming build.

After the top has been tested for deflection, the location of the rosette is determined and the "micro" router jig is used to route out the channel for insertion of the rosette ring.  At this point I had already pieced together the wood mosaic and cut it out.

The rosette and black fiber purfing in dry fitted to ensure fit and the channel and surrounding area is wiped with shellac.  I intended to use thin Cyanoacrylate (super glue) to glue in this rosette.  Shellac seals the spruce top and prevents the glue from staining the top.  The rosette is placed into the channel dry and then flooded with Cyanoacrylate.  Once the glue dries the black fiber purfling can be leveled with a finger plane. 

Here's how it came out...​