Census of Victorian Minerals. 259 



In Nos. 1 and 2 some schreibersite is present. Nos. 3 and 4 

 are calculated without schreibersite. The specific gravity, 

 7 '201 4, appears to be lower than usual, and remains so 

 after allowing for a 13.06 per cent, mixture of schrei- 

 bersite. See note under taenite. 



CoLUMBiTE. — Columbate and tantalate of iron and manganese. 

 The mineral recorded as columbite from Maldon, has since 

 been proved, by Mr. Rule, to be a ferriferous variety of 

 Rutile. This error arose through the quantity avail- 

 able being very limited, and the chemical reactions 

 mistaken for those characteristic of columbium, and 

 also from the fact that the crystals were very small, 

 and twinning gave them the appearance of belonging 

 to the orthorhombic, instead of the tetragonal system 

 (U.). 



COPIAPITE. — Hydrous iron sulphate. 



Earthy, Bull's Well, Jan Juc (B.M.). 



Corundum. — Alumina. 



Rolled fragments, some ferruginous and some passing into 

 diaspore, Beechworth (B.M.). In nearly all the creeks 

 as a grey sand, blue sapphires generally occurring with 

 it, the largest measured -^^ of an inch across, and is of 

 a navy blue colour, Mitchell River, Boggy Creek, 

 Wentworth, Swift's Creek (CI.). Rounded fragments 

 of a greenish colour, Garlick's Lead, Trentham (W.). 

 Corundum in all its varieties but the ruby, which is 

 rare, is commonly met with in the water courses in, 

 and alluvial deposits derived from, eruptive and meta- 

 morphic rocks. Much of the so-called black corundum 

 is only pleonaste. 



Daubreelite. — Sulphide of chromium and iron. 



Surrounding some of the nodules of troilite, Cranbourne, 

 No. 1 Meteorite (F.). In the Cranbourne No. 2 

 Meteorite, two patches of troilite are surrounded by 

 schreibersite, and a black mineral which is probably 

 daubreelite (W.). See note under taenite. 



Diamond. — Pure crystallized carbon. 



Octahedron of a pale yellow tint, found in a wasli containing 

 tourmaline, amethyst, mica, quartz crystals, etc., Cong- 



