Olivine has also been used for a refractory product. It is used to make refractory brick and made use of for a casting sand. Both of those of those takes advantage of are in drop as possibility substances are less remarkably-priced and easier to get. Hans Strøm in 1766 explained http://www.pate-a-modeler.com/useful-tips-on-indispensable-elements-for-olivine/