Emerald Company Profile

Aggregated data from the web about Emerald

Company Name	Emerald
Website	https://www.emerald.com
Snippet	Discover impactful Journals, Books & Case Studies from Emerald Publishing on Emerald Insight.
Color	Bluish green to green
Luster	Vitreous
Streak	White
Category	Beryl variety
Cleavage	Imperfect on the [0001]
Fracture	Conchoidal
Unit cell	a = 9.21 Å, c = 9.19 Å; Z = 2
References	[1]
Diaphaneity	Transparent to opaque
Space group	(6/m 2/m 2/m) – dihexagonal dipyramidal
Formula mass	537.50
Birefringence	δ = 0.0040–0.0070
Crystal habit	Massive to well Crystalline
Crystal system	Hexagonal (6/m 2/m 2/m) Space group: P6/mсc
Refractive index	nω = 1.564–1.595, nε = 1.568–1.602
Specific gravity	Average 2.76
Optical properties	Uniaxial (−)
Mohs scale hardness	7.5–8
Ultraviolet fluorescence	None (some fracture-filling materials used to improve emerald's clarity do fluoresce, but the stone itself does not)
Formula.mw-parser-output .nobold{font-weight:normal}(repeating unit)	Be3Al2(SiO3)6

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