essential gold calmag from elevation organics doesn't have any N
Calcium Carbonate, Calcium Lignosulfonate, Magnesium Sulfate, Humic Acid
Calcium carbonate isn't soluble. I'm assuming they are using Leonardite as a slurry to keep it suspended in the bottle. This product is intended for soil, not hydroponics or foliar.
The choice of calcium lignosulfate is really interesting. It is just complexed (not chelated), but that's the first time I've seen it used like this.