The whole system is pretty stupid. First two elite stages, based on metals (silver and gold). Top stage, based on a stone (Diamond - oh, and of course Diamond Plus), and - what is more - based on a (usually) colourless stone (yes, I know there are coloured diamonds, but they are due to impurities - a pure Diamond is colourless).

Honestly, I think all oneworld airlines should be encouraged to move to the same colour scheme - ruby, sapphire and emerald. Of course that means losing BA Blue, Cathay Green..... We wouldn't want to get those confused, would we??

The old distinctions between silver and diamond cards were subtle, and probably too subtle. However, the shiny silver-coloured flash on the Diamond cards was quite classy, The current matte black just looks cheap. My MH Platinum card looks classier than my CX Diamond card, which is so plain it actually looks like a specimen card, not the real thing.

Oh, and I can't believe I just spent ten minutes writing a detailed response on an issue so utterly trivial. Hahahaha!