388 DETERMINATION OF MINERALS. 
I. ELEMENTS. 
1. Lustre metallic ; liquid. 
MERCURY, p. 128. This is the only metallic mineral which is liquid 
at the ordinary temperature and atmospheric pressure. 
2. Lustre metallic ; malleable and eminently sectile. 
GOLD, p. 109. G.=15-19°5 ; yellow ; fusible ; not sol. in nitric acid 
or HCl, but sol. in aqua regia. 
PLATINUM, p. 124. G.=16-19; nearly white ; infusible ; insol. in 
nitric acid. 
PALLADIUM, p. 127. G.=11°3-11°8; grayish-white ; diff. fusible ; 
sol. in nitric acid. 
SILVER, p. 116. G.=—10-11:1; white; fusible ; sol. in nitric acid, 
and deposited again on copper. 
COPPER, p. 131. G.=8°84; copper-red ; fus.; sol. in nitric acid, 
and the solution becomes sky-blue when ammonia is added 
IRON, p. 171. G.=7:3-7°8; iron-gray; attracted by the magnet. 
The only other mineral of metallic lustre that is also malleable and 
eminently sectile is argentite, a silver sulphide, along with two others 
of like composition but different crystallization. 
3. Lustre metallic; brittle; B.B. wholly volatile, 
but give off no sulphurcus fumes. 
BISMUTH, p. 101. G.=9-73 ; reddish-white ; on coal a yellow coat- 
ing ; fumes inod. 
ANTIMONY, p. 100. G.=66-6°7; tin-white ; fumes dense wh., inod. 
ARSENIC, p. 98. G.=5-9-6; tin-white ; fumes white, alliaceous. 
TELLURIUM, p. 96. G.=6 1-63; tin-white ; fus.; fumes white ; 
flame green. 
The only other mineral that is wholly volatile, and also gives off no 
sulphurous*fumes, is allemontite, an antimony arsenide. 
4, Lustre metallic; H.=1-2; B.B. on coal infusible ; 
no fumes. 
GRAPHITE, p. 107. 
5. Lustre unmetallic ; takes fire readily in the flame 
of a candle, and burns with a blue flame. 
SULPHUR, p. 94. 
6. Lustre adamantine ; H.=10. 
DIAMOND, p. 108, Easily scratches corundum or sapphire. 

