Mineralpedia Details for Cancrinite

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Cancrinite

Formula: (Na,Ca,[box])₈(Al₆Si₆)O₂₄(CO₃,SO₄)₂·2H₂O
Crystal System: Hexagonal
Crystal Habit: Massive, Prismatic
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: blue, colorless, gray green, yellow, white
Streak: white
Class: Hexagonal - Pyramidal
Fracture: Conchoidal
Hardness: 6
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Cancrinite from Khibiny Massif, Kola Peninsula, Russia

Yellow crystalline Cancrinite throughout matrix. Rich.

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Cancrinite from French River, Rutter pluton, Ontario, Canada

A rich specimen with large crystal grains of deep yellow Cancrinite with feldspar and aegerine.

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Cancrinite from Dennis Hill, Litchfield, Kennebec Co., Maine, United States

Gorgeous yellow crystalline mass. A great example of this mineral. Cancrinite occurs in a variety of colors including red, white, and blue. The mineral is a feldspathoid which forms in igneous rock which has more aluminosilicates of sodium, potassium, or calcium and not emough silica to form feldspars.