Geological mapping and drilling have proved 2 100 000 tonnes of high purity limestone. Large additional reserves are available to the south. The deposit is required to supplement depleted reserves in existing Marte quarry. The Gambier Limestone is pure and uniform, averaging 98.7% total carbonate. The major deleterious component is iron oxide staining related to joints and / or clay filled solution holes in upper part. Whiting milled from Honeysuckle Flat limestone is suitable for a variety of uses where high degree of whiteness is not required. Further drilling and sampling may define limestone suitable for glass manufacture. Further geological investigation recommended in Marte area to locate small deposit of white, pure limestone to supplement production from Caroline area.