Serandite Value, Price, and Jewelry Information


SERANDITE: Mt. Ste. Hilaire, Quebec, Canada (~1.5, rough ~ 2 inches long). Photo © Joel E. Arem, PhD, FGA. Used with permission.

This essentially is another one locality mineral, where very small gems have been cut from an occasional crystal fragment that is not always even transparent.

Serandite Value

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Serandite Information

DataValue
NameSerandite
Crystallography Triclinic. Crystals prismatic in appearance, stubby, well formed.
Refractive Index 1.660-1.688
Colors Rose red, pinkish, salmon red.
Luster Vitreous, pearly on cleavage.
Fracture Uneven
Hardness 4.5-5
Specific Gravity 3.32
Birefringence 0.028
Cleavage Perfect 1 direction
Stone SizesCut serandite over 2-3 carats is very rare. In fact, cut gems of any size are very rare. Cutting material comes only from Quebec, and even large crystals seldom have facetable areas. USNM: 2+ (Quebec). Private Collection: 5+ (flawed). National Museums of Canada (Ottawa, Ontario): 18.65, 2.8 (translucent).
Luminescence None.
Transparency Transparent to translucent.
Absorption Spectrum Not diagnostic.
FormulaNa (Mn,Ca)2Si3O8(OH).
Optics α = 1.660; β = 1.664; γ = 1.688. Biaxial (+); 2V= 35°.

SERANDITE Series to Pectolite.

Occurrence: In nepheline syenite rocks at Mt. Ste. Hilaire, Quebec, Canada. Also known from Los Islands, Guinea.

Comments: This essentially is another one locality mineral, where very small gems have been cut from an occasional crystal fragment that is not always even transparent.

Name: For J. M. Sérand, West African mineral collector.