Beryl Mineral Data + Say BERYL

General Beryl Information
Help on Chemical Formula: Chemical Formula: Be3Al2Si6O18
Help on Composition: Composition: Molecular Weight = 537.50 gm
   Beryllium   5.03 %  Be   13.96 % BeO
   Aluminum   10.04 %  Al   18.97 % Al2O3
   Silicon    31.35 %  Si   67.07 % SiO2
   Oxygen     53.58 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Be3Al2Si6O18
Help on Environment: Environment: Mainly granitic pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) Prehistoric
Help on Locality: Locality: Pala pegmatite District, San Diego Co., California for morganite. Columbia for emeralds. Russia for heliodor. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the ancient Greek, beryllos, signifying a "precious blue-green color of sea water" stone, but through later usage, applied only to beryl.
Help on Synonym: Synonym: Aquamarine - blue
  Emerald - green
  Goshenite - colorless
  Heliodor - yellow
  ICSD 2791
  Morganite - pink
  PDF 9-430
 

Beryl Image

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Beryl

Comments: Transparent Goshenite, the colorless variety of beryl with orthoclase and muscovite.
Location: Pingwu, Sichuan, China. Scale: 9 x 8.5 cm.
© Fabre Minerals
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Beryl

Comments: Transparent Aquamarine, the blue variety of beryl.
Location: Nagar, Pakistan. Scale: 3 x 4 x 8.5 cm.
© Dan Weinrich
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Beryl   Calcite

Comments: Transparent emerald, the green variety of beryl on calcite (marble) matrix.
Location: Coscuez, Boyac?, Colombia. Scale: 2.5 x 2.5 cm.
© Fabre Minerals
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Beryl

Comments: Transparent Morganite, the pink variety of beryl.
Location: Nuristan, Laghman Province, Afghanistan. Scale: 9.2 x 6.5 cm.
© John Veevaert
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Beryl

Comments: Transparent Heliodor, the yellow variety of beryl.
Location: Wolodarsk, Wolynsky, Ukraine. Scale: 2.8 x 0.7 cm.
© John Veevaert
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Beryl

Comments: Red beryl prism on rhyolite matrix.
Location: Violet claims, Wah Wah Mountains, Beaver County, Utah, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Beryl   Fluorapatite   Muscovite   Apatite

Comments: Pink crystals of fluorapatite with pale blue beryl (aquamarine) on books of muscovite crystals.
Location: Nagar area, Gilgit district, Northern Areas, Pakistan. Scale: 3 x 3 cm.
© Dan Weinrich

Beryl Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.9975
Help on Cell Dimensions: Cell Dimensions: a = 9.215, c = 9.192, Z = 2; V = 675.98 Den(Calc)= 2.64
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.867(1), 3.254(0.95), 7.98(0.9),
Help on Forms: Forms:

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Forms: [ 1 1 2] [ 2 1 2] [ 0 0 1] [ 1 0 2] [ 1 0 0] [ 1 1 0]

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Brown G E , Mills B A , American Mineralogist , 71 (1986) p.547-556, High-temperature structure and crystal chemistry of hydrous alkali-rich beryl, from the Harding pegmatite, Taos County, New Mexico, Sample: T = 24 deg C, before heating, O2x has been corrected

View Additional jPOWD Structure files for Beryl
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [3] [30] [31] [32] [33] [4] [5] [6] [7] [8] [9]
 

Physical Properties of Beryl

Help on Cleavage: Cleavage: [0001] Imperfect
Help on Color: Color: Green, Blue, Yellow, Colorless, Pink.
Help on Density: Density: 2.63 - 2.9, Average = 2.76
Help on Diaphaniety: Diaphaniety: Transparent to subtranslucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Columnar - Forms columns
Help on Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 7.5-8
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: white
 

Optical Properties of Beryl

Help on Dichroism (e): Dichroism (e): yellowish green, colorless, or colorless.
Help on Dichroism (w): Dichroism (w): bluish green, blue, or pink.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.039 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2205,KPDmeas= 0.2106,KC= 0.2123
Help on Optical Data: Optical Data: Uniaxial (-), e=1.564-1.595, w=1.568-1.602, bire=0.0040-0.0070.
 

Calculated Properties of Beryl

Help on Electron Density: Electron Density:

relectron=2.74 gm/cc
note: rBeryl =2.77 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.06519
Boson Index = 0.93481
Help on Photoelectric: Photoelectric:

PEBeryl = 1.55 barns/electron
U=PEBeryl x relectron= 4.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Beryl is Not Radioactive
 

Beryl Classification
Help on Dana Class: Dana Class: 61.1.1.1 (61)Cyclosilicate Six-Membered Rings
  (61.1)with [Si6O18] rings; possible (OH) and Al substitution
  (61.1.1)Beryl group
 
61.1.1.1 Beryl Be3Al2Si6O18 P 6/mmc 6/m 2/m 2/m
 
61.1.1.2 Bazzite Be3(Sc,Al)2Si6O18 P 6/mcc 6/m 2/m 2/m
 
61.1.1.3 Indialite Mg2Al4Si5O18 P 6/mcc 6/m 2/m 2/m
 
61.1.1.4 Stoppaniite! (Fe,Al,Mg)4(Na,[])2[Be6Si12O36]·2(H2O) P 6/mmc 6/m 2/m 2/m
 
61.1.1.5 Pezzottaite! Cs(Be2Li)Al2Si6O18 R 3c 3m
Help on Strunz Class: Strunz Class: VIII/E.12-10 VIII - Silicates
  VIII/E - Cyklosilicates, six rings [Si6O18]12-
  VIII/E.12 - Beryl series
 
VIII/E.12-10 Beryl Be3Al2Si6O18 P 6/mmc 6/m 2/m 2/m
 
VIII/E.12-20 Bazzite Be3(Sc,Al)2Si6O18 P 6/mcc 6/m 2/m 2/m
 
VIII/E.12-25 Stoppaniite! (Fe,Al,Mg)4(Na,[])2[Be6Si12O36]·2(H2O) P 6/mmc 6/m 2/m 2/m
 
VIII/E.12-30 Indialite Mg2Al4Si5O18 P 6/mcc 6/m 2/m 2/m
 
VIII/E.12-40 Cordierite Mg2Al4Si5O18 C ccm 2/m 2/m 2/m
 
VIII/E.12-50 Sekaninaite (Fe,Mg)2Al4Si5O18 C ccm 2/m 2/m 2/m
 

Other Beryl Information
Help on References: References: NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Beryl :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 - Applied Mineralogy 6 -Athena 7 - CalTech Mineral Spectroscopy 8 - Crocoite.com Mineral Locations 9 - EUROmin Project 10 - Glendale Community College 11 -Google Images 12 -Google Scholar 13 -Handbook of Mineralogy (MinSocAm) 14 -Handbook of Mineralogy (UofA) 15 - HyperPhysics 16 -MinDAT 17 -MinMax(Deutsch) 18 -MinMax(English) 19 - Mineral and Gemstone Kingdom 20 -Mineralienatlas (Deutsch) 21 - Minerals of Wisconsin 22 -NSDL Reciprocal Net (JAVA) 23 -NSDL Reciprocal Net (JAVA) 24 - Philatelic Mineralogy 25 -QUT Mineral Atlas 26 - Scandinavian mineral gallery 27 - Tradeshop.com - The Rainbow of Gems 28 - University of Manchester - Mineral Structure 29 -University of Minnesota 30 -University of Texas at Austin 31 - WWW-MINCRYST 32 - YupRocks 33 -École des Mines de Paris

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Print or Cut-and-Paste your Beryl Specimen Label here :

Beryl

Be3Al2Si6O18
Dana No: 61.1.1.1 Strunz No: VIII/E.12-10
Locality:

 

Notes:

 
 
   
 
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