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.
The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.
|Crystallography||Triclinic. Crystals prismatic in appearance, stubby, well formed.|
|Colors||Rose red, pinkish. salmon red.|
|Luster||Vitreous, pearly on cleavage.|
|Cleavage||Perfect 1 direction. Fracture uneven. Brittle.|
|Stone Sizes||Cut 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).|
SERANDITE Series to Pectolite.
Optics: 11 = 1.660215 = L664; V 1 1.688.
Biaxial (+), 2V: 35°
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.