Halotrichite

Fe2+Al2(SO4)4 · 22H2O Halotrichite, a member of the halotrichite group, found in Mont Saint-Hilaire is one of the rarest minerals in Canada. PHYSICAL CHARACTERISTICS: Color is usually white. Luster is silky. Diaphaneity is transparent. Crystal System is monoclinic; P2/m. Crystal Habits include very fine bent silky fibers…

Normandite

Normandite (Type Locality) NaCa(Mn,Fe)(Ti,Nb,Zr)Si2O7OF Normandite, a member of the låvenite group, mineral species originally found at MSH in 1980 and described in 1997. It was originally designated as UK #59. PHYSICAL CHARACTERISTICS: Color is usually orange to orange-brown, yellow in fine…

Andradite

Ca3Al2(SiO4)3 Andradite, a member of the garnet mineral species, occurs at MSH in miaroletic cavities and rarely in marble xenoliths. PHYSICAL CHARACTERISTICS: Color is usually dark to pale-olive green, brownish green and yellow-green. Luster is vitreous. Diaphaneity is translucent to opaque. Crystal System is…

Datolite

CaBSiO4(OH) Datolite, a member of the gadolinite group, is on the list of rear minerals found in Canada. PHYSICAL CHARACTERISTICS: Color varies from pale yellow to greenish-yellow and white. Luster is vitreous and dull on spheres. Diaphaneity: transparent to translucent. Crystal System is monoclinic; P21/a.…

Grossular

Ca3Al2(SiO4)3 Grossular, a member of the garnet group, minerals species found in Canada. PHYSICAL CHARACTERISTICS: Color is usually bright orange to orange-brown or reddish brown. Luster is vitreous to adamantine. Diaphaneity is transparent to translucent. Crystal System is isometric; Ia3d. Crystal Habits include sharp trapezohedrons to…

Hedenbergite

CaFeSi2O6 Hedenbergite, a member of the pyroxene mineral species, is rare at Saint Hilaire. It is difficult to distinguish visually from the other members of the pyroxene group. PHYSICAL CHARACTERISTICS: Color is usually colorless to pale yellow. Luster is vitreous to resinous.…

Berthierine

Fe22+Al(Si,Al)O5(OH)4 Berthierine, a member of the kaolinite-serpentine group, is found as pseudomorphs at MSH. It is a pseudomorph after a mineral with a layered structure, possibly part of the mica group, minerals mined in Canada. PHYSICAL CHARACTERISTICS: Color is usually greenish…

Willemite

Zn2SiO4 Willemite is an extremely rare mineral species at MSH. It fluoresces brilliant green under SW and LW; it displays a strong dull green phosphorescence. PHYSICAL CHARACTERISTICS: Color ranges from beige, pale gray and pale blue on larger crystals and usually…

Halite

NaCl The occurrence of halite at Mont Saint-Hilaire is exceedingly rare mineral in Canada. It is found as a white flaky alteration with UK #81 and an undetermined sulfate mineral on UK #81. PHYSICAL CHARACTERISTICS: Color is usually white. Luster is vitreous…

Hibschite

Ca3Al2(SiO4)3-x(OH)4x, (x=0.2 – 1.5) Hibschite is part rare rear minerals in Canada, at Mont Saint-Hilaire. It is often cited as hydrogrossular. PHYSICAL CHARACTERISTICS: Color varies from pale green, grayish-white and yellow-brown. Luster is vitreous. Diaphaneity is transparent to translucent. Crystal System is isometric; Ia3d. Crystal…

Quartz

SiO2 Quartz is part of common mineral species at Mont Saint-Hilaire and is widespread amongst the different environments. It does present some fluorescent zones; bright yellow under SW and LW. PHYSICAL CHARACTERISTICS: Color varies from colorless, gray, brown and black. Luster is…

Strontianite

SrCO3 At MSH, strontianite is a rare mineral species in igneous breccia cavities and hornfels. It displays weak white fluorescence under SW and LW. PHYSICAL CHARACTERISTICS: Color varies from colorless to white. Luster is vitreous to silky. Diaphaneity is transparent to translucent, opaque…