therefore indigestible..that I should look for organic plant based trace mineral compounds..anyone care to comment?
All trace minerals are "inorganic". That's what a mineral is. What the article means is that they are inorganic in the sense that the supplements just have mineral compouds, rather than being derived from a food source. That doesn't make them indigestible, but it can mean they aren't as readily absorbed. Vitamins and minerals are ALWAYS absorbed better when derived from food sources, such as eating a balanced diet, then they are by popping a supplement with a mineral compound in it. But if you need supplements, I don't know if there's such a striking difference between regular mineral supplements or "plant-based" whole food supplements. I don't doubt that whole food plant supplements are probably better, but I don't know that they're better to the degree that it makes the regular supplements "terrible". The best source is STILL diet.
Inorganic does not mean indigestible, but plant derived trace minerals are the best form to take because they have been broken down by soil micro-organisms and predigested by plants, making them much more bioavailable than minerals which have not. I use Liquid Life trace minerals. EDIT: The best source would definitely be diet except that our soils have had a whopping 85% mineral depletion over the past hundred years thanks to over-farming. Your great grandma's bowl of spinach had eight times the nutrition that the bowl you eat today has.