23 
all cases of volcanic origin. Near these substances saloon* 
are placed some specimens of the lolite of Werner, Hist. 
also called dichroite from its exhibiting two different 
colours when viewed in different positions. 
(Case 10.) This case contains zeolitic substances, 
viz. several varieties of scolicite and of mesotypCy 
among the specimens of which may be particu¬ 
larized those with perfect prismatic acicular crystals 
(needle-stone of Werner); the delicately fibrous va¬ 
rieties ; the red compact variety, by some called cro- 
calite, &c.—The natrolite of Klaproth, of which a 
few specimens are added, is by some considered as 
a variety of mesotype.— Stilbite^ mostly crystallized: 
among the coloured varieties is the red from Fassa 
(Fassait).— Apophyllite, sonie varieties of which 
have been mistaken for mesotype and stilbite.— 
Analcime, among the crystallized varieties of which 
are remarkably large specimens of the trapezoidal 
modification.— Chabasite ov chabasie, in groups of 
primitive rhombohedral and modified crystals. 
i^Case 11.) Continuation of zeolitic substances : 
— prehnite^ crystallized and massive, the grass- 
green variety of which, discovered in South Africa 
by the Abbe Rodion, has been mistaken for chry¬ 
solite, chrysoprase, and even emerald. To this be¬ 
longs also the koupholite; and the substance known 
by the name of Chinese jade, of which some speci¬ 
mens are added, may likewise be referred to prehnite. 
— Harmoiome^ or cross stone, both in simple and 
cruciform 
