Spertiniite is another extremely rare species from MSH.
Color is usually pale blue.
Luster is vitreous.
Diaphaneity is opaque to translucent.
Crystal System is orthorhombic, Cmc2.
Crystal Habits include thin crusts and thin plates to 1mm.
Cleavage not observed.
Fracture is (??).
Hardness is (??).
Specific Gravity is approximately 3.9 g/cm
Streak is (??).
Associated Minerals include eudialyte, ussingite and villiaumite.
Distinguishing Features: Crystal habit and color.
Origin: Named in 1981 after Francesco Spertini (b.1937), Canadian
MinRec 21:339 (1990), Dana 8:277 (1997)
DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE: