Lynne â€” Yes, your wall pocket is from Walter Crane's The Baby's Opera, A Book of Old Rhymes with New Dresses, 1877. Sowerby pattern number 1296, which dates it to early 1878. Rather scarce, in my experience.
I thought that Sowerby used the term "malachite". I can see thistles and a shamrock; there should be roses somewhere on this patriotic piece. I haven't found it yet, probably because the design wasn't registered.
Ah, yes, now I look closely there are roses as well... at the bottom of the design immediately under the shamrocks.
I think malachite refers to all the colours, the Sorbini blue seems to be the only one with a specific name, the others are just green, purple, grey. It is a very bright Wedgwood blue (on the red side of the spectrum, if you know what I mean), not the usual slightly turquoisey one.