Shells are used decoratively in many ways.
How far stone was used decoratively is hard to judge.
When using eyelets for crafting, they are generally used decoratively.
Diamond plate can also be used decoratively, particularly highly polished aluminum variants.
Cabinet doors panels can be used decoratively on cabinet sides, where exposed, for a more finished appearance.
Zippers are used decoratively, wound around an arm hole or making patterns the length of long black dresses.
As modern ships now use steel cable for the most part, the knots are now more often used decoratively than functionally.
Also, the cones can be dried in the fall and used decoratively.
Instead of any of that, the music was used simply decoratively (not to say promotionally) or to blow listeners away with a big sound.
In "10 on Ten," the numbers are used decoratively, perhaps even sentimentally.