The Ultimate way to understand minerals is to review with a set of tiny specimens you could take care of, look at, and observe their Houses. Cheap mineral collections can be found in the Geology.com Keep. Impression copyright iStockphoto / Anna Usova. Altered Soil pH: Gypsum may have a liming effect https://www.propanraya.com/id/produk/eco-gypsum-ee-4050