Charcoal isn’t coal. There are several types of natural coal and charcoal, and they all have slight differences in density and chemical composition; so they probably all look a bit different when burning. Just like how different brands and types of charcoal can also look slightly different when burning (such as one kind throwing off sparks while it ignites and another that doesn’t).
I’ve never seen natural coal burning. But I’ve seen at least 3 types (not just brands but actual differences in how they are made) of charcoal burn, and they all give quite a different “show” as they do.
Uh… No. I like milk more than cacao. You don’t need sugar for milk chocolate. You can get unsweetened milk chocolate in the baking aisle. That’s what I use for chocolate chip cookies or if I plan on making a sauce.
I also just happen to have a bar of 90% cacao dark and a milk chocolate bar from the same brand (chocolate xoxo) on hand, and they both have 14g of sugar.