Recently i start drinking spring water rich in calcium and magnesium.
All kinds of french cheese. Greek yogurt & skyr. Milk sometimes
Discussion
I'm glad you mentioned animal based sources.
for example spinach is loaded with calcium but only a tiny fraction is bioavailable in that form. so little it shouldn't even be counted.
Humans are omnivorous and we can def get nutrients from plants but herbivores are really effective at it.
-its best to just eat those creatures.
* BTW, I still eat spinach.