18 
SALOON, to that country, and afterwards deposited by the lat- 
Nat.Hist. ter in Mr. Greville’s collection. Other red and blue 
varieties from Siberia, and from Massachusets in 
-North Amevlca; the flesh-coloured tourmaline from 
i^zer^a 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 ar¬ 
ranged the substances belonging to the species of 
quartz .—Bock crystal: various modifications of its 
crystalline forms: small dodecahedral and other 
crystals, known by the trivial names of Gibraltar 
diamonds, Bristol diamonds, &c.; varieties of co¬ 
lour according to w^hich the crystals obtain the vul¬ 
gar denominations of smoky topaz or morion, cairn¬ 
gorm, citrine, &c.; specimens of rock crystal, in¬ 
closing various substances, such as rutile, brown 
iron-stone, micaceous iron, needle antimony, acti- 
note, asbest, chlorite, &c.; groups of rock crystal. 
—Amethyst quartz of various tints, in grouped cry¬ 
stals; nodule lined with crystals of amethyst and 
cross stone or harmotome, from Oberstein. To 
this is added the thick-fibrous amethyst of Werner, 
considered by others as a sub-species of common 
quartz. 
(Case 5.) Common quartz: among the specimens 
of this widely diffused substance, which offers such 
great variety in its external aspect, the more remark¬ 
able are those of hacked, corroded and cellular quartz 
from 
