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Quartz crystals - click for larger pic
Quartz crystals
Canadian
Museum of Nature sp.
Photo by Violet Anderson
© Royal Ontario Museum

Quartz crystals - click for larger pic
Quartz crystals
Photo by Violet Anderson
© Royal Ontario Museum

Quartz crystals - click for larger pic
Quartz crystals
© Doug Merson

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Home > Mineral Descriptions > Quartz - (5 Photos)



Quartz
SiO2

     Quartz is common at Mont Saint-Hilaire and is widespread amongst the different environments. It does present some fluorescent zones; bright yellow under SW and LW.

PHYSICAL CHARACTERISTICS:

Color varies from colorless, gray, brown and black.
Luster is vitreous.
Diaphaneity is transparent to translucent to opaque.
Crystal System is hexagonal; P312.
Crystal Habits include prismatic and equant crystals to 20cm;
   very rarely as Japan-law twins, scepters are fairly common.
Cleavage {101} is distinct.
Fracture is conchoidal to subconchoidal.
Hardness is 7.
Specific Gravity is approximately 2.65 g/cm3.
Streak is white.
Associated Minerals include aegirine, albite, amphibole group,
   apophyllite series, bastnäsite, brookite, calcite, cordylite, elpidite,
   lorenzenite, microcline, narsarsukite and pectolite.
Distinguishing Features: Crystal habit.
Origin: Known since antiquity, the origins of the name are uncertain,
   possibly from the German quarz, hard, itself of uncertain derivation.

CLASSIFICATION:

Dana System
# 75.1.3.1

Strunz Classification
# IV/D.01-10

REFERENCES:
MinRec 21:331 (1990), Dana 8:1573-1586 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
¤¤

MX
¤¤

SS
--

MC
--

HF
¤¤

BR
¤¤

SX
--

FR
--

Legend

Quartz crystals - click for larger pic
Quartz crystals
© Quintin Wight

Quartz crystals - click for larger pic
Quartz crystals
© Gilles Haineault