Hi Steve.
Just wanna get my head around few things:
What is the rock made from? Ceramic, old calcium carbonate, resin, cement, etc?
The colour of the rock, nice and purple, is it artificially coloured or is ut actual corralline growung on it?
Cured meaning artificial rock, kept for how ever long in saltwater systems to seed with beneficial bacteria, etc?
Some stunning pieces there I must add, let me know where u are nowadays and I'll pop around to say hi and come have a closer look for my new project.