130 
LONG 
GALLERY. 
Nat. Hist. 
near Villaricca, in Brazil, and in the chlorite slate of that 
neighbourhood;— chrysoberyl or cymophane, among the 
specimens of which may be specified those in a matrix 
of quartz and feldspar with garnets, from Haddam in 
Connecticut, and also those from Saratoga and New 
York.—In this Case are also placed the specimens of 
lazulite or lapis lazuli, (which furnishes the valuable 
pigment known by the name of ultramarine,) massive 
and exhibiting planes of the rhomhoidal dodecahedron ; 
the haiiyne, and a few other of the imperfectly known 
silicates of alumina, soda and lime combined with sul¬ 
phates : such as the spinellane, &c. 
Case 38. In this Case are provisionally placed (be¬ 
sides sodalite and eudialyte , substances which, being 
chloriferous, may perhaps, be referred to the chlorides, 
Case 60) the suites of tourmaline and shorl , many va¬ 
rieties of which have been found to contain boracic 
acid. Among those here deposited are, the rubellite, 
also called siberite (tourmaline apyre of Hauy), a 
specimen of which, remarkable both for size and 
form, is that in the centre of the Case: it was pre¬ 
sented by the king of Ava to the late Colonel Symes, 
when on an embassy to that country, and afterwards 
placed by the latter in Mr. Greville’s collection ; other 
red and blue varieties, chiefly from Siberia and from 
Massachusetts in N orth America; the flesh-coloured 
tourmaline, from Rozena in Moravia; the dark green, 
called Brazilian emerald; the asparagus green variety 
in dolomite from Campo Longo; varieties of common 
shorl;— aooinite , in most beautiful crystals, from Bourg 
d'Oisans in Dauphiny, from Norway, &c. 
Case 39. The silicates terminate in this glass Case, 
with t*he topaze and chondrodite, two species which 
from their chemical composition, might be classed with 
the fluorides (in Case 59);—among the specimens of 
topaz here deposited may be specified a series of crys¬ 
tals of Saxon, Brazilian, and Siberian varieties, among 
which there are several new modifications; Saxon 
varieties imbedded in the topaz rock, an aggregate of 
topaz, 
