Grey Cloud Glass is another very rare colour, with few examples known. Unlike other Cloud Glass colours, the trails in Grey consist of several different colours. The base glass is frosted clear flint glass, which gives it the grey appearance. The trails are predominately a brown colour with a green tinge. In addition trails of a milky white glass and a blue glass have also been added. This gives Grey Cloud pieces a very unusual and distinctive appearance. Grey Cloud Glass was only made by S Reich & Co.