I was working on my resource pack, when I couldn't use layers like you could with items. Instead, I get the "Missing Texture." I have not modified the "cube.json" file, I have also not moved the 2 texture files elsewhere, they are both in fact in the textures/blocks/ folder. I have also checked that my model file is in the models/blocks folder, too. Also, this seems to be a problem with the ores, not sure if this affects every block, though. And for reference, here is my file:

---------------- Beginning of my file (this part is not in the file) ----------------
{
"parent": "block/cube",
"textures":

{ "particle": "blocks/coal_ore", "layer0": "blocks/stone", "layer1": "blocks/coal_ore" }

}

------------------- End of the file (this part is not in the file) -------------------

And below will be my texture files
(And on a positive note, the particles do work, too)

Also, feel free to also tell me if I ACTUALLY did do something wrong here.