... apart from the two at the bottom, they're a melo melo and a conch. I learnt to paint pearls in a generic fashion, from a YouTube video. A very good one, I might add. But, with a little googling and studying some actual ones, I found a more natural and less systematic way of painting worked better for what I wanted to achieve. Extra tip; gum arabic produces a much less aggressive solution for lighter areas than whipping out the masking fluid.