So i got a firework directly from the creative inventory, intending to fly around the 21w07a caves and then i went into an amethyst geode and launched a firework on the wall and i heard a crystally noise when it hit the top. Not just A noise, but a repeated noise until the firework disappeared. Because i usually play with subtitles on, the subtitles said it was "Block breaking" and so i tried it on different blocks, but no. It only does this only on "#crystal_sound_blocks".

(btw i tested it in 20w45a and it still was there)