A monochromatic image is composed of a gradient of a single colour, and has an emphasis on texture and composition. Whilst this sculpture in Canberra is not entirely monochromatic it does demonstrate the power of a simple colour scheme and shape and form.
(The stainless steel cones (1976-1982) from this angle reflect the ground and the trees in the National Gallery Sculpture Garden, Canberra, Australia)
TRAVEL WORDS 
Oh wow I love it and was about to ask if it was all in one piece and then got my answer with the second photo, magic 🙂
That sculpture looks so different in that light Jude, it was a bright sunny day and no ground reflections in my photo. Well seen and an interesting take on the challenge
The ground reflections are a little strange. Maybe the angle I was facing.
Quite a unique colouring
I love this photo. As others have already said, it looks like two completely different materials. It’s an interesting sculpture in the full photo that you posted here in the comments, but your main photo makes it very much more intriguing.
Only goes to prove the point that varying your angle on a subject can alter the impact of the photograph. I’m much more conscious of that now than I used to be.