Add Blue Stone Type to Ice Caves (Azurite?)

For a builder like me, it has become a bit of a sore spot that drop after drop Mojang are more than happy to add lots of warm colour blocksets to the game but cold colours get largely ignored. We are starved for blue and purple blocks and I think the ice caves would be the perfect opportunity to add a blue stone block type to the game and would look really great in the caves.

I think azurite would be a really great addition to the caves and a similar stone like blockset for it would make a great compliment to the previously added sulphur and cinnabar block sets.