Whether you call them hexagon shelves or honeycomb shelves, they are very popular right now. You can hang them in any combination you wish. Build them using this free tutorial.
Follow the tutorial at the link to build your own hexagon/honeycomb shelves. You could build several and link them together.
Once you get the knack of building these honeycomb hexagon shapes you can configure them any way you wish. Follow along at the link to build your own.
Build an assortment of geometric shelves and mount them on the wall to display your favorite collections. Here is the free tutorial for each different shape.
Honeycomb shelves are build using six pieces of lumber cut to the same length at 30 degree angles. Be sure to follow through to page 2 to see the finishing process.
Make as many or as few as you like of these honeycomb shelves. Here is the full tutorial.