Some chrysolites with an injected twin ones have been found in volcanic rocks in Keluo and Wudalianchi of Heilongjiang Province, in Dalinor of inner Mongolia Autonomous Region, in Kuandiang of Liaoning Province, in Luotuofeng of Hebei Province, in Kardaxi of Xinjiang Autonomous Region as well as in Gaojiang island of the Xisha islands of Hainan Province in the past few years, respectively. Four star-shaped and six star-shaped crystals were formed by a twining plane (031) while 2V angles ranged from 82?2? to 84?2?, negative. mineral. The results of electron probe analysis are: SiO2 38%-39 %, MgO 43%-44%, CaO 0.2%-0.4% and Fo 82-83. These injected twining chrysolites, as the first found, have some identical characteristics in genesis. They were formed in Late-Cenozoic, hosted in strongalkalinebasaltic rocks, and associated with both central eruption and stress.