VICTORIAN MINERALS,—CASE XY. 87 
5. ARRAGONITE 
Lime). 
Chambers’ Quarry, Richmond. 
i sheet 1 S.E. 
In fine needles, collected in radiating 
tufts. 
(Carbonate of 
7. ARRAGONITE. 
Sunbury, Jackson’s Creek. 
ł sheet 7 N.E. 
Filling cavities in newer basalt. 
8. ARRAGONITE. Map No. M 20. 
Kilmore, 4 sheet 4 S.W. 
In dense, close-grained basalt. 
6. CALCITE. 
Degraves’ Mill, Kyneton. 
4 sheet 9 S.E. 
Fine yellow scalenohedrons, with two 
rhombohedrons, associated with chaba- 
asite. 
9. ARRAGONITE. 
Richmond Quarries. +sheet 18.E. 
10, FeRRO-CALCITE. List No. M 39. 
Mitchell’s Falls, Barfold, Cam- 
paspe River. 4 sheet 13 S.E. 
Note.—This mineral occurs very abundantly in the lowest basaltic 
flow immediately under the Falls, It bears a close resemblance to 
“ chalcedony,” forming semi-transparent, botryoidal crusts and globular 
nobs of a bluish or yellowish white color; whilst its fine concentric 
radiating structure, mostly accompanied by a change to a darker color, 
gives it the appearance of “spherosiderite.” The external surfaces 
are generally coated with a thin, brittle crust of bright-brown, glittering 
carbonate of iron, sometimes decomposed to yellow oxide. According 
to an analysis by Mr. J. C. Newbery it varies slightly in composition, 
according to color: the darker portions containing most iron and man- 
ganese. An average specimen gave :— 

Carbonate of lime aD 72°43 
iron orn xo AINI 
X magnesia TD 5:00 
manganese ne ? 1:92 
100:00 
Its hardness is 3°5—sp. gr. 286. 
On comparing this composition with the minerals classed under “ Dolo- 
mite,” a very great difference will be observed, especially as regards 
lime and magnesia; we have consequently thought it not unjustifiable 
to call this mineral “Ferro-calcite.” It is probable, that it represents a 
part-pseudomorph after “ sphzrosiderite,” by exchange of carbonate of 
lime for carbonate of iron. 
11. CALCITE. Map No. Mu 16, 
Lennox’s Reef, near Mount Tar- 
rangower, + sheet 145,W. 
Occurs in obtuse rhombohedrons. 
Minute specks of iron pyrites occur on 
the apices of some of the crystals. 
13. FERRO-CALCITE. 
Saltwater River, 3 miles above 
Keilor Bridge. sheet 1 N.W, 
Same as No, 10. Coats cavities in 
vesicular basalt, 
12. Doc-roorH SPAR. 
Degraves’ Mill, Kyneton. } sheet 
9 S.E. 
Aggregations of yellow, long-pointed 
crystals (hexagonal prism), with acute 
rhombohedron ; coating cavities in 
basalt, 
14. ARRAGONITE. 
Ballan. 4 sheet. 
In fibrous, radiating nodules. 
tunnel on Mr. Lyons’ property. 
From 
