ROOM III. MINERALS. 145 



matrix of quartz and felspar, with garnets from Haddam, in 

 Connecticut. 



13. [41.] Carbonates of soda; of barytes, or witherite ; 

 barytocalcite ; carbonate of stroutia. 



The remainder of this Case is filled with varieties of 

 aragonite. 



14. [20.] Amethystine quartz. Rock crystal in various 

 modifications and colours, from Gibraltar, Bristol, &c. ; rock 

 crystal in a wrought state ; among these is the celebrated 

 Dr. Dee's show-stone. (See Sir Walter Scott's "Demonology.") 



15. [40.] Silicates, with one or more borates. Tourmaline; 

 axinite ; rubellite ; of the latter a remarkable example, pre- 

 sented by the King of Ava to the late .Col. Symes. In- 

 dicolite, <fcc. 



16. [21.] Common quartz in great variety; numerous 

 pseudomorphous crystals, derived from modifications of cal- 

 careous and fluor spars. Stalagmitic quartz from the hot 

 springs of the Geysers in Iceland, Santa Fiora in Tuscany, 

 and from Luzon, one of the Philippine Islands. Specimens 

 of " lightning tubes," from England and from Africa. Hyalite, 

 Haytorite, aventurino quartz, &c. 



17. [39.] Molybdic acid and molybdates. Oxide of chro- 

 mium and chromates. Boracic acid, or sassoline, from Vul- 

 cano ; borate of magnesia ; datholite, &c. 



18. [22.] Varieties of quartz. Prase; hornstone; among the 

 specimens of hornstone is a splendid example of the silicified 

 stem of a palm (psarolinite) ; cat's eye, from Ceylon ; chert ; 

 flint ; groups of stalactitical flint passing into calcedony ; 

 flint nodules, containing water ; calcedonies. 



19. [38.] Silicates containing yttria and protoxide of cerium. 

 Combinations of columbic, or tantalic acid, with protoxides of 

 iron, lime, magnesia, yttria, zirconia, &c. Oxides of antimony. 

 Tungstates. Vanadic acid and vanadates. 



20. [23.] Calcedonic substances, cut and polished. Car- 

 nelian ; plasma ; heliotrope ; bloodstone ; chrysoprase from 

 Kosemiitz, in Silesia. Agates; a beautiful agate nodule, 

 from the trap formation of Central Asia, presented by C. 

 Fraser, Esq. 



21. Table containing polished slabs of various marbles. 



22. Table with polished slabs of coralline marbles. 



L 



