Rock dust

I have been reading quite a few articles on the benefits of rock dust for the garden. The rock dust can provide essential minerals that may have been used up by over farming an area for years. Micro-organisms can benefit and in turn can improve the soils with the plants being the final beneficiary. Some of the best rock dust ( stone that has been crushed to a dust form) is glacier dust. This glacier dust has been created by the glaciers picking up rock ( all types) in there movement and crushing the stone with there tremendous force. The different kinds of stone have different mineral makeups which in turn have different benefits. One example is the limestone. The limestone can have calcium and magnesium. My garden was low in these areas when I tested it. The other day I stopped at a Stone masons place in Kansas City, Missouri and he was cutting a lot of limestone. I asked if I could have some of the dust. I got about a pound. I have sprinkled about a tablespoon around a bunch of my tomatoes. I will watch and see if it has an effect. I am going to also try an experiment I read about in a garden magazine. It basically said if you could find a rock dust from a stone plant or other source you could check to see if the dust gathered has a benefit. Take pots and fill will standard potting soil or dirt from the garden. Add a tablespoon to one of the pots and mix in and plant seeds in the two plants and watch for the next 8 weeks., The one with the dust is suppose to do noticeably better. I am going to try it and see.