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Kutnohorite crystals
© Bill Lechner
Ca(Mn,Mg,Fe2+)(CO
Kutnohorite, a member of the dolomite group, is a relatively rare mineral at Mont Saint-Hilaire. It is indistinguishable from other members of the dolomite and calcite groups.
PHYSICAL CHARACTERISTICS:
Color is usually gray, very pale green.
Luster is vitreous to pearly.
Diaphaneity is transparent to translucent.
Crystal System is hexagonal; 3.
Crystal Habits include sprays of prismatic crystals to 1mm and equant
crystals to 0.5mm in druses.
Cleavage {101} is perfect.
Fracture is uneven to subconchoidal.
Hardness is 3.5 – 4.
Specific Gravity is approximately 3.12 g/cm
Streak is white.
Associated Minerals include aragonite and marcasite.
Distinguishing Features: Crystal habit.
Origin: Named in 1901 after its discovery locality, at Kañk, Kutná Hora,
Bohemia, Czech Republic.
CLASSIFICATION:
Dana System
# 14.2.1.3
Strunz Classification
# V/B.3-30
REFERENCES:
MinRec 21:315 (1990), Dana 8:452 (1997)
DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:
MSH
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