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Wurtzite crystals - 3mm
© Gilles Haineault

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Wurtzite
ZnS

     Two polytypes of wurtzite are found at MSH, -2H is rare and -4H is very rare. Both polytypes exhibit weak fluorescence, -2H fluoresces red while -4H fluoresces orange.

PHYSICAL CHARACTERISTICS:

Color is yellow to orange-yellow, pink, pale green and reddish brown.
Luster is dull to resinous.
Diaphaneity is translucent.
Crystal System is hexagonal; P63mc.
Crystal Habits include sharp hexagonal, hemimorphic skeletal
   crystals to 3mm and tetrahedral shaped pseudomorphs to 1cm.
Cleavage {001} is good and {110} is good.
Fracture is uneven.
Hardness is 3.5 - 4.
Specific Gravity is approximately 4.0 g/cm3.
Streak is white.
Associated Minerals include aegirine, albite, amphibole group,
   analcime, ancylite-(Ce), astrophyllite, bastnäsite, calcite, catapleiite,
   chlorite group, cordylite, dolomite, elpidite, epididymite, eudialyte,
   fluorite, gonnardite, mangan-neptunite, nepheline, polylithionite,
   pyrophanite, rhodochrosite, sérandite and siderite.
Distinguishing Features: Crystal habit and forms.
Origin: Named in 1861 for Charles A. Wurtz (1817-1884),
   French chemist.

CLASSIFICATION:

Dana System
# 2.8.7.1

Strunz Classification
# II/C.13-10

REFERENCES:
MinRec 21:347 (1990), Dana 8:72-73 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
¤¤

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
¤¤

FR
--

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