A Polished Apple Without Apple-Polishing

I'm on a very low level with neither influence nor power. Nevertheless, this morning, I received this lovely looking apple from my colleague Herbert:



It grew in Herbert's garden next to the mirabelle tree. Unfortunately, Herbert does not know the cultivar. However, it was even worse that the taste could not keep up with the look. The apple's acidity was appealing, but its texture was far too ligneous. The mirebells, which I received from Herbert last year, were far better.