THE RASHLEIGH COLLECTION OF MINERALS. 325 



Several of the specimens of this metal, especially those in a 

 crystallized state, are very valuable. A large mass of Electrum, 

 a natural alloy of gold and silver, is marked as having cost £30. 



Silver ores are very plentiful, both in the native state and in 

 combination with other elements. The fine suite of Ruby silver 

 ores deserves special attention. 



Copper is well represented in the collection. In its native 

 state and in the form known as Cuprite there are excellent 

 examples. The large series of beautiful specimens of the very 

 rare minerals Chalcophyllite, Liroconite, Libethenite, Clinoclase 

 and Olivenite, from the Gwennap district, are almost unique. 

 Malachite in polished slabs and unusually fine Cornish forms of 

 crystallized Erubescite, Copper Pyrites, Copper Glance and 

 Bournonite may also be seen. 



Iron ores are brought together from all parts of the world, 

 even the Pacific Islands. The crystals of Hfematite from Elba 

 are well defined ; also those of Chalybite from Huel Maudlin, 

 near Lostwithiel. A rare mineral from the Gwennap district, of 

 which there are fine examples, is that of Pharmacosiderite or cube 

 ore. Vivianite from Huel Jane, and Chalcosiderite from the 

 Caradon mines, also call for special notice. 



The principal lead ore in the collection is Galena. The 

 specimens from Cumberland are very beautiful, being, in a 

 number of f.ases, associated with Blende, Calcite and Quartz. 

 Pyromorphite in lovely shades of green, Crocoisite of hyacinth- 

 red and Cerussite, the white carbonate of lead, give to the group 

 a most charming appearance. 



The old tin mines of Cornwall had a great reputation for 

 producing magnificent crystals of Cassiterite (tin-stone.) In the 

 collection are to be found some of the finest ever raised, the 

 crystals being very large and the majority of them of a most 

 brilliant lustre. The varieties known as Wood-tin, Toad's-eye tin 

 and Stream-tin are well represented. 



The ores of Antimony and Zinc, and the rarer metals 

 Uranium, Bismuth, Cobalt, Platinum, Tellurium, etc. are shown 

 in considerable numbers. 



Amongst the non-metallic minerals may be found fine 

 examples of Graphite, Native Sulphur in large crystals, Calcite 



