Schairerite is another rare species from MSH.
Color is usually colorless.
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is hexagonal, 31
Crystal Habits include poor blocky crystals with etched faces.
Cleavage is indistinct.
Fracture is conchoidal.
Hardness is 3.5
Specific Gravity is approximately 2.6 g/cm
Streak is white.
Associated Minerals include arfvedsonite, kogarkoite, leucophanite,
pectolite, phlogopite, shortite and UK # 90A.
Distinguishing Features: Crystal habits.
Origin: Named in 1931 after John Frank Schairer (1904-1970),
American physical chemist.
Dana 8:625 (1997)
DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE: