DEPARTMENT OF MINERALOGY. 103 



Minerals. 

 By Presentation : 



Calcite from Trecastell mine, near Conway, Carnarvonshire : 

 hy F. N. Ashcroft, Esq. 



Ruby from Rimu, South Island, New Zealand : hy B. C. Aston, 

 Esq. 



Anhydrite and gypsum from the Hatfield Main Colliery, near 

 Doncaster : by H. Berry ^ Esq. 



Salt from Cape Verd Islands : hy Senlior Carvalho. 



A blue crystal of zircon, probably from Siam : hy the late Sir 

 Arthur Herbert Church, K.C. V.O., F.R.S. 



A valuable collection of gem-stones formed by the late Sir 

 Arthur Herbert Church, K.C.Y.O., F.K.S., presented, in accordance 

 with a wish expressed in his will, hy his widow. Lady Church. 



The collection comprises 203 choice and selected faceted stones, 

 170 of which are mounted in 162 gold rings (33 stones being un- 

 mounted) : in addition, 29 small diamonds are employed in the 

 settings. The following 21 mineral species are represented : 

 corundum (13 stones), spinel (19), chrysoberyl (8), quartz (2), 

 chrysoprase (2), opal (15), zircon (69), peridot (7), phenakite (l), 

 spodumene (1), enstatite (1), moonstone (3), labradorite (1), garnet 

 (22), beryl (4), topaz (8), andalusite (1), cordierite (2), tourmaline 

 (22), sphene (1), turquoise (1). Amongst the garnets is a fine 

 example of spessartite, the rare manganese-garnet ; amongst the 

 tourmalines a very fine rubellite ; amongst the opals very good 

 examples of " black " opal and fire-opal ; and amongst the zircons 

 a fine suite of green stones and two remarkable blue stones. 



Chalcedony pseudomorphous after bone from Radley Park, 

 Berks : hy Dr. Frank Corner. 



Glauconite from Cowcroft, Bucks : by T. Crook, Esq. 



Aragonite from Alston, Cumberland : hy Rev. Thomas C. 

 Crosby. 



Radiated topaz (pycnite) from Mount Bischoff, Tasmania : hy 

 Rev. Alfred Curtis. 



Forms of artificial silica : by Allan B. Dick, Esq. 



Grilbertite and quai;^z pseudomorphs simulating an orthoceroid 

 fossil, from near St. Austell, Cornwall : by Philip Dollman, Esq. 



Chrysotile, and 10 specimens of gold and tin ores, all from 

 Rhodesia : hy Wm. Drabble, Esq. 



Artificial preparations of various forms of silica : by Dr. C. N. 

 Fenner. 



Blue beryl from Mont Blanc : by Miss J. M. Fry. 



Geikelite from Ceylon : hy Sir A. Geikie, K.C.B., F.R.S. 



Pyrrhotite from Pondoland, South Africa : hy W. H. Goodchild, 

 Esq. 



Fluor, a group of large green cubes, from Faulhorn ; adularia, 

 as tabular crystals with asbestos, from Maderanerthal, and, as 

 twisted crystals with black zonal enclosures, from Disentis ; and 

 quartz, enclosing rutile, from Sasso rosso, St. Gotthard ; all from 

 Switzerland : by Rev. J. M. Gordon. 



