Tiny T charcoal / chain

T-shaped pendant (50 mm wide and about 60 mm long) composed of brass pipes that received a black oxide coating ("black oxide process") on top of a copper layer. The surface of the pendant looks uneven: each piece is unique, showing dark brown spots/reflections here and there (just like a piece of charcoal!). The inside of the pipes shows the copper layer (please see close up picture of the pointy pipe).
The pendant is mounted on an about 90cm long clip chain (same color/treatment).