16 
saloon. The pycnite, referred by Werner to the beryl* 
51a t. Hist, under the name of shorlous beryl, and consider- 
ed as a variety of topaz by Hairy, is here placed 
between those two species. — Also the pyrophysa- 
lite from Fahlun in Sweden, considered by the 
same cry*tallographer as a variety of topaz — • 
This case also contains the tourmaline and com- 
mon shod. Among the varieties of the former 
may be specified the rubellite, also called si- 
berite 9 (tourmaline apyre Haiiy), a remarkable 
specimen of which, both with regard to form 
and volume, is here preserved : it was presented 
by the King of Ava, to the late Colonel Symes, 
when on an embassy to that country, and after- 
wards deposited by the latter in Mr. Greville's 
collection. Other red and blue varieties from 
Siberia ; that from Rozena in Moravia, which is 
by some considered as a variety of pycnite, &c 
—Varieties of common shorl. 
(Case 4.) In this and the following case are 
arranged the substances belonging to the species 
of quartz.— Rock crystal : various modifications 
of its crystalline forms; small dodecahedral 
and other crystals known by the trivial names of 
Gibraltar diamonds, Bristol diamonds, &c. ; va- 
rieties of colour, according to which the crystals 
obtain the vulgar denominations'of smokey topaz 
cr morion, cairn-gorm. citrine, &c. ; specimens of 
rocl^ 
