Nephrite Greek "λίθος νεφριτικός"; "νεφρός λίθος", which means 'kidney stone' and is the Latin and Greek version of the Spanish "piedra de ijada" (the origin of "jade" and "jadeite"). Accordingly, nephrite jade was once believed to be a cure for kidney stones. Besides the terms already mentioned, nephrite has the following synonyms and varieties: "aotea", "axe-stone", "B.C. jade", "beilstein", "kidney stone", "lapis nephriticus", "nephrit", "nephrita", pounamu, "New Zealand greenstone", "New Zealand jade", "spinach jade" (dark grayish green), and "talcum nephriticus". "Tomb jade" or "grave jade" are names given to ancient burial nephrite pieces that have a brown or chalky white texture
The First Series of Standardized Forms of Words with Non-standardized Variant Forms only three times in the "People's Daily" between 1995 and 2000. The Ministry of Education of the People's Republic of China has called on teachers throughout China to use and teach the forms recommended in "The First Series of Standardized Forms of Words with Non-standardized Variant Forms". Before March 31, 2005, a student's use of one of the variant written forms not recommended in the "First Series" on a test like Gaokao would not influence points earned on a given question. Implementation of the Ministry's policy is not to influence the usage of variant written forms in research on ancient