NOTES ON THE MINEKALS OF JAPAN. 223 



23. Chalcosite. 



Massive chalcosite is found at Osakuzawa in Kikuchü, &c. 



24. Cinnabar. 



The principal localities for cinnabar in Japan are Koma- 

 CxAESHi in the Yamato Provice, Hirado in Hizen Province, Ise 

 Province, Awa Province (in Shikoku), Tsukiyoshi in lyo Pro- 

 vince, <fec. Very minute crystals are sometimes observed with 

 the help of a lens. 



25. Bornite. 



This mineral is found in massive state in many copper 

 mines of Japan, especially in those of Omodani in Echizen 

 Province. 



26. Chalcopyrite. 



Chalcopyrite is worked in most Japanese copj^er mines, 

 among which those of Ani, Akakawa, Osaeuzawa, Ogoya, Ade, 

 &c., give good crystals, usually showing only -^ , but sometimes ^ 



and ""-^t- 



A small flattened crystal of this mineral from the Ashio 

 mines in Shimotsuke Province, a curious triangular wedge- 

 shaped crystal from Arakawa (Wada's collection), and nu- 

 merous complicated twin-like forms (somewhat resembling Fahlore 

 twins on O, with a projecting part on some of the tetrahedral 

 faces) found at Ogoya, Ani and Osaruzawa, are still unsolved 

 problems in the determination of crystals of Japanese chalcopy- 

 rite. 



27. Matildite. 



A nearly compact aggregate of this mineral was found with 

 native gold in a mine of Kukiyama near Nikkö in Shimotsuke 



