From Corner C to B is a line blend of Lithium (C) and Magnesium (B)
This line blend contains no Calcium and has the colour has muted pale Blue at Corner B(T16) The colour in this line blend progressive from very opaque Blue grey to some beautiful shinier greys @ tiles17,18 and 19.and onto a shiny green as it interacts as the Lithium increases and the surface deteriorates at Tiles 20 and 21.Lithium seems to be a valuable secondary flux in smaller proportions adding melt and unusual colour but is not so useful in larger amounts.