Mineral Information and Data:

Mercury
Hg [CNMNC approved formula]

Named from the Latin Mercurius, the mythological messenger of the gods, in allusion to its mobility in liquid form; the chemical symbol from the Latin hydrargyrum, liquid silver.

IMA status : Valid species (Pre-IMA Ancient) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
01.01.07.01  
  (01) Native Elements
  (01.01) with metallic elements other than the platinum group
  (01.01.07)
  
Nickel-Strunz
(10th edition) :
01.AD.05
  (01) Elements
  (01.A) Metals and Intermetallic Alloys
  (01.AD) Mercury-amalgam family
  
Crystal system: Trigonal System
Point group (H-M): 3m (or 3 2/m) — hexagonal-scalenohedral
Unit cell: a = 3.463 Ǻ, c = 6.706 Ǻ
Crystal Habit: Commonly as liquid spheres or globules; crystallizes in rhombohedra; rhombohedral at -39°C. Occurs as a liquid above -39°C
  
Color: Tin-white, silver
Diaphaneity: Opaque
Luster: Metallic, brilliant
Hardness (Mohs): 0 - Liquid
Measured Density: 14.382 g/cm3
Streak: Could not be powdered
  
Geologic Setting: In hydrothermal deposits formed at low temperature and associated with hot springs.
Mineral Association: Cinnabar, metacinnabar, calomel, terlinguaite, eglestonite, mercurian silver, mercurian gold, pyrite, dolomite, barite, quartz
  
Synonyms/varieties: Quicksilver, Native Mercury
Comments: Liquid above −38.9 °C; volatile; vapor highly toxic.

 

Mercury
Origin: Socrates mine, Sonoma Co., USA
Sample size: 4 x 3 x 3 cm with 0.5-1 mm beads
Photo: Tom Loomis

 

Mercury
(zoom-in of above)

 

Mercury
An extremely rich ore specimen liberally covered with shiny bubbles or drops of native mercury (quicksilver) and tiny streaks of cinnabar. Mercury is the only recognised mineral that is found as a liquid at room temperature. Cinnabar alters to native mercury in the oxidized zone of deposits. Native mercury is also quite rare.
Origin: Socrates Mine, Sonoma Co., California, U.S.A.
Sample size: 5.5 x 4.5 x 2.5 cm
Photo: Rob Lavinsky

 

Mercury
(zoom-in of above)

 

Mercury
Origin: Socrates Mine, Sonoma Co., California, U.S.A.
Sample size: 5.5 x 3 x 2.5 cm
Photo: Rob Lavinsky

 

Mercury
(zoom-in of above)

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