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Beryl

Beryl (/ˈbɛrəl/ BERR-əl) is a mineral composed of beryllium aluminium silicate with the chemical formula Be3Al2(SiO3)6. Well-known varieties of beryl include emerald and aquamarine. Naturally occurring hexagonal crystals of beryl can be up to several meters in size, but terminated crystals are relatively rare. Pure beryl is colorless, but it is…

Deposits, Varieties & Etymology

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Birefringence
δ = 0.0040–0.0070
Category
Cyclosilicate
Cleavage
Imperfect on {0001}
Color
Green, blue, yellow, colorless, pink, and others
Crystal class
Dihexagonal dipyramidal (6/mmm) H-M symbol: (6/m 2/m 2/m)
Crystal habit
Prismatic to tabular crystals; radial, columnar; granular to compact massive

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Overview

Etymology

Deposits

Crystal habit and structure

Varieties

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Map overview Semantic statistics

Beryl

Nodes127
Edges126
Triples156
Avg. degree1.98
Density0.015748
Components1

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Beryl

Top relations

related to Red beryl · 28
Beryl → Afghanistan, Beaver County, CIBJO, Emerald, Fillmore, Juab County, Lamar Hodges, Like, Madagascar, Maynard Bixby, Maynard's Claim, Mn3, New Mexico, North American, Old, Paramount Canyon, Pismire Knolls, Red, Round Mountain, Ruby-Violet Claim
related to Etymology · 18
Beryl → Ancient Greek, Belur, Brille, Consequently, Danish, Dravidian, Dutch, German, India, Italy, Karnataka, Latin, Middle English, Old French, Prakrit, The, Velur, When
related to Deposits · 16
Beryl → Albany, As, Brazil, Bumpus Quarry, Colombia, Common, In, It, Madagascar, Maine, Malakialina, New England's, New Hampshire's, Russia, United States, Ural Mountains
related to Goshenite · 12
Beryl → Ca, Co, Colorless, Fe, Goshen, However, In, Massachusetts, Nowadays, Sc, The, Ti
related to Aquamarine and maxixe · 11
Beryl → Aquamarine, Brazil, Decoloration, Fe2, Fe3, Green-yellow, It, Its, Latin, Sri Lanka, The
related to Golden beryl and heliodor · 11
Beryl → Both, Fe3, Gems, Golden, Greek, Hall, Probably, The, United States, Unlike, Washington
related to Emerald · 10
Beryl → Emerald, English, French, Greek, Latin, Medieval Latin, Middle English, Most, Old French, The
related to Morganite · 7
Beryl → Federal Trade Commission Guidelines, It, Mn2, Morganite, Orange/yellow, Regulations, The
related to Further reading · 6
Beryl → Emerald, Geoscience Press, ISBN, John, Other Beryls, Sinkankas
related to Crystal habit and structure · 5
Beryl → As, Increasing, Normally, SiO3, These

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Important terminology

emerald aquamarine found emeralds red color also beryllium crystal blue yellow mineral morganite varieties rare green hexagonal golden used pink

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
BerylBirefringenceδ = 0.0040–0.00701.00infobox
BerylCategoryCyclosilicate1.00infobox
BerylCleavageImperfect on {0001}1.00infobox
BerylColorGreen, blue, yellow, colorless, pink, and others1.00infobox
BerylCrystal classDihexagonal dipyramidal (6/mmm) H-M symbol: (6/m 2/m 2/m)1.00infobox
BerylCrystal habitPrismatic to tabular crystals; radial, columnar; granular to compact massive1.00infobox
BerylCrystal systemHexagonal1.00infobox
BerylDiaphaneityTransparent to translucent1.00infobox
BerylFormula.mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:l…1.00infobox
BerylFormula mass537.50 g/mol1.00infobox
BerylFractureConchoidal to irregular1.00infobox
BerylIMA symbolBrl1.00infobox
BerylLusterVitreous to resinous1.00infobox
BerylMohs scale hardness7.5–8.01.00infobox
BerylOptical propertiesUniaxial (−)1.00infobox
BerylPleochroismWeak to distinct1.00infobox
BerylReferences: 1121.00infobox
BerylRefractive indexnω = 1.564–1.595 nε = 1.568–1.6021.00infobox
BerylSpace groupP6/mcc1.00infobox
BerylSpecific gravity2.63–2.921.00infobox
BerylStreakWhite1.00infobox
BerylStrunz classification9.CJ.051.00infobox
BerylTenacityBrittle1.00infobox
BerylTwinningRare1.00infobox
BerylUltraviolet fluorescenceNone (some fracture-filling materials used to improve emerald's clarity do fluoresce, but the stone itself does not). Morganite has weak violet fluorescence.1.00infobox
BerylUnit cella = 9.21 Å, c = 9.19 Å; Z = 21.00infobox
Berylis aflawless 20.90text

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