@Joe
Just having a lot of minerals in the soil will not provide you with high quality food and it's not a way to do high brix gardening. You need to have minerals in the right balance.
I've written about it a bit here:
http://designerecosystems.com/2014/08/06/getting-your-soil-right-cation-exchange-capacity-and-base-saturation/
For example you will not have good results if you grow plants in 50% azomite and 50% peat mixture as azomite has a relatively a lot of potassium and little calcium and magnesium. The same with phosphorus... You can put shitloads of azomite in your beds, but it won't produce (in itself) high nutrient density. Don't get me wrong it will most likely be better as you added trace minerals, but it won't be as good as it's genetically possible.
Testing for micro and macronutirents cost about 20$. Do that, balance your soil (with thouse nutrients) and on top of that give your soil some rock dust and you will have great results.
This is another level of the game.