Kutnohorite
Ca(Mn,Mg,Fe²⁺)(CO₂)

     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; R3.
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/cm³.
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:

REFERENCES:
MinRec 21:315 (1990), Dana 8:452 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

Legend