Meihuayu-jade occurring in Ruyang Goapty, Henan Province, is a kind of black amygdaloidal andesite. Its matrix is characterized by thin lath-shapedlow albite microcrystals, exhibiting vitropatic-interlocking texture. Porphyritic crystals are low albite. Mineral composition of amygdaloidal bodies is quitecomplex, and the major minerals include low albite, maximum-microcline,epidote, ripidolite, quartz, calcite, magnetite etc., making up a set of typical epithermal mineral assemblage formed as a result of postmag matic hydrothermal alteration. In this paper, the authors made a detailed study on feldspars, epidote and chloxite by means of X-ray diffraction analysis, electric microprobe analysis and ihfrared spectroscopic analysisi It is found that Plagioclase is low albite inorder, alkali feldspar is low temperature maximum microcline with fairly high triclinity and order, epidote contains abundant iron, and chlorite is ripidolite.In addition, micro-hardness test-was made on several spots of the matrix in the jade, and the result shows that the jade has rather high hardness (Mohs'hardness being 5.2) and beautiful streaks, and is massive and of good quality,thus serving as a good jade material.