Honeycomb
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A honeycomb is a mass of hexagonal prismatic cells built from beeswax by honey bees in their nests to contain their brood and stores of honey and pollen.
Honeycombs for sale in Sareyn, Iran
A Western honey bee on a honeycomb
Natural honeycombs on a building
Honeycomb with eggs and larvae
Rhombic dodecahedron
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In geometry, the rhombic dodecahedron is a convex polyhedron with 12 congruent rhombic faces. It has 24 edges, and 14 vertices of 2 types. It is a Catalan solid, and the dual polyhedron of the cuboctahedron.
A garnet crystal
Image: Rhombicdodecahedron
Image: Modell, Kristallform Deltoiddodekaeders Krantz (2)