Sample Color Color Mineral Powder Color Plate Powder 27 hematite 28 limonite 29 orthoclase 30 gypsum Station 7. The chemical reaction of a mineral to a solution or to water, or to a particular procedure is also sometimes a diagnostic property. One chemical reaction is taste. We will skip this property because of the tremendous risk for chemical poisoning and more importantly, disease transmission. In the field taste is sometimes used.
Calcite fizzes strongly when acid is applied.
Other minerals that may at first examination appear like calcite or dolomite do not fizz. Try this for yourself. Very fine-grained minerals. There are two minerals that are so fine grained, you will only see them in rock form. The minerals in these rocks are of the order of 1-4 microns.