Nephrite excavated in the Philippines were of two types&colon; white nephrite and green nephrite. Both nephrite and jadeite were used from prehistoric periods for hardstone carving. Hematite, Hiddenite, and Kalunite looked identical to Zoisite, Nephrite and Jadeite respectively. Few nephrite (jade or greenstone) artefacts were found. Nephrite jade also occurs in this area. Wealthy families often gave their sons lock charms made from jade, nephrite, silver, or gold. Accordingly, nephrite jade was once believed to be a cure for kidney stones. It is made of polar jade, which is a kind of Nephrite. In modern usage "pounamu" almost always refers to nephrite jade. Many minor centers had access to their own jade (nephrite). The region is home to 92% of the world's nephrite jade. Hei-tikis are traditionally carved by hand from bone, nephrite, or bowenite. Western Canada is the principal source of modern lapidary nephrite. A lot of nephrite tools and amulets are known since the Early Neolithic (VII mill. It contains exploited deposits of nephrite, talc and asbestos.