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和田(tian)(tian)(tian)玉，“中國四大名(ming)玉”之(zhi)一(yi)（其(qi)(qi)三為陜西藍田(tian)(tian)(tian)玉、遼(liao)寧岫(xiu)玉和河南獨山玉）。和田(tian)(tian)(tian)玉雖然因新疆和田(tian)(tian)(tian)而(er)命名(ming)，但(dan)其(qi)(qi)本身不是(shi)地(di)域概(gai)念，并非特指新疆和田(tian)(tian)(tian)地(di)區出產的玉，而(er)是(shi)一(yi)類產品的名(ming)稱。中國把透閃(shan)石(shi)(shi)成份占(zhan)98%以上的石(shi)(shi)頭都命名(ming)為和田(tian)(tian)(tian)玉，都在國標(biao)范圍內。其(qi)(qi)主要成分是(shi)角(jiao)(jiao)閃(shan)石(shi)(shi)族單(dan)斜角(jiao)(jiao)閃(shan)石(shi)(shi)晶(jing)系之(zhi)透閃(shan)石(shi)(shi)，透閃(shan)石(shi)(shi)含量越高，質量越好。