They almost look like fireworks.
I use this large slice of an old oak tree to do many things...I laid our harvest of cilantro, beets, potatoes and lettuce on it earlier this week and now, I'm gathering coriander seeds (which is what you get when you let your cilantro flower and then dry)...I will grind up most of them using this mortar and pestle. Today, I added them to a pot of beans.