Mineral Information and Data:

Jadeite
NaAlSi2O6 [CNMNC approved formula]

Named in 1863 from jade, a material commonly containing jadeite, in turn from the Spanish Piedra de yjada, or colic stone, for its supposedly curative powers for nephritic colic.

IMA status : Approved Species 1988 ()
CLASSIFICATION 
Dana
(8th edition) :
65.01.03c.01  
  (65) Inosilicate Single-Width Unbranched Chains, W=1
  (65.01) with chains P=2
  (65.01.03c) C2/c clinopyroxenes (Na clinopyroxenes)
  
Nickel-Strunz
(10th edition) :
09.DA.25
  (09) Silicates
  (09.D) Inosilicates* Structural terminology per Liebau (1985)
  (09.DA) with 2-periodic single chains, Si2O6; pyroxene family
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
Unit cell: a = 9.44 Ǻ, b = 8.57 Ǻ, c = 5.23 Ǻ, β = 107.6°
Crystal Habit: Crystals rare. Commonly massive, or fibrous, granular, compact.
Twinning: On {100} or {001}, simple or lamellar
  
Color: Apple-green, emerald-green, bluish green, leek-green, greenish white, white, may show green spots, rarely blue or violet; colorless in thin section
Diaphaneity: Translucent
Luster: Subvitreous, pearly on cleavages
Hardness (Mohs): 6
Measured Density: 3.25 g/cm3
Cleavage: 1; {110} good
Tenacity: Very tough when massive
Fracture: Splintery
Streak: White
  
Geologic Setting: In high-pressure metamorphic rocks of the glaucophane facies; a component of eclogite.
Mineral Association: Albite, quartz, muscovite, omphacite, glaucophane, calcite, aragonite, analcime,
zeolites.
  
Synonyms/varieties: Chloromelanite (compact dark green to black var.), feitsui, imperial jade (compact translucent emerald-green gem var.), jade (compact gem var.)
Other Properties: Gemstone Readily Available.

 

Jadeite
Origin: Russian River, near Cloverdale, Mendocino Co., California, U.S.A.
Sample size: Microscopic image
Photo and Owner: Lou Perloff

 

Jadeite
Origin: Russian River, Mendocino Co. California, U.S.A.
Sample size: 4.5 x 3.2 x 3 cm
Photo: Rob Lavinsky

 

Jadeite
(zoom-in of above)

<<< BACK TO MINERAL SEARCH