NOTES ON THE MINERALS OF JAPAN. 243 



67. Gypsum. 



YoGOSAWA in Kai Province. — Good crystals with co P, 

 ûoPœ. and -P, developed on all sides and sometimes measuring 

 3 cm. in length, are here collected. Besides simple crystals, 

 there are also to be found twins on either odPcô or -Pcö. 



According to Ko, good crystals are also found at Miyazaki 

 in Iwate-ken ; they occur, besides, at Kuwabaea in Shinano 

 Province, in Ogasawarajima, at Kwankaiji in Bungo, at 

 KosAKA in Rikuchü, &c. A beautiful fibrous aggregate of white 

 gypsum has been found at Yuda in Rikuchü. 



68. Melantherite. 



OsARUZAWA in Rikuchü gives beautiful crystals and fibrous 

 aggregates of this mineral, in association with copper ore. 

 The crystals are flattened on coP^ and elongated in the 

 direction of the c axis. The length attains 2.5 cm. There are 

 observed coP cb, coP, oP, P ^, -W ^, fP ^, &c. The colour of 

 crystals is greenish-blue, with a yellow tinge on the edges, 

 which is due to oxidation. The aggregate shows a silky lustre, 

 and resembles fine asbestus in white-coloured long fibres. The 

 crystals contain some copper, while the aggregates, which are 

 said to be derived from the decomposed crystals, are quite 

 free from it. 



69. Alunite. 



At TocHiHARA in Harima, there has been found a compact 

 specimen of this mineral, which Kochibe believes to be derived 



No specimens of Reinite (See Neues Jalu-buch für Minemlogie &c., 1879.) were found in 

 collections accessible to me. 



