Beryl

Beryl
Beryl09.jpg
Three varieties o beryl: morganite, aquamarine an heliodor
General
CategoryCyclosilicate
Formula
(repeatin unit)
Be3Al2(SiO3)6
Strunz clessification09.CJ.05
Creestal seestemHexagonal
Space groupHexagonal dihexagonal dipyramidal
H-M symbol (6/m 2/m 2/m)
Space group: P 6/mmc
Unit cella = 9.21 Å, c = 9.19 Å; Z = 2
Identification
Formula mass537.50
ColourGreen, blae, yellae, colourless, pink an ithers
Creestal habitPrismatic tae tabular cystals; radial, columnar; granular tae compact massive
TwinninRare
CleavageImperfect on {0001}
FracturConchoidal tae irregular
TenacityBrickle
Mohs scale haurdness7.5–8
SkinkleVitreous tae resinous
StreakWhite
DiaphaneitySkyre tae leamin
Speceefic gravityAverage 2.76
Optical propertiesUniaxial (-)
Refractive indexnω = 1.564–1.595
nε = 1.568–1.602
Birefringenceδ = 0.0040–0.0070
PleochroismWaik tae distinct
Ultraviolet fluorescenceNane (some fractur fillin materials uised tae improve emerald's clarity dae fluoresce, but the stane itsel daes nae)
References[1][2][3]

In geology, beryl is a meeneral componed o beryllium aluminium cyclosilicate wi the chemical formula Be3Al2(SiO3)6. The hexagonal crystals o beryl mey be vera smaa or range tae several meters in size. Terminated crystals is relatively rare. Pure beryl is colourless, but it is frequently tintit bi impurities; possible colours are green, blae, yellae, reid, an white.

Other Languages
aragonés: Berilo
العربية: بيريل
asturianu: Berilu
azərbaycanca: Beril
беларуская: Берыл
беларуская (тарашкевіца)‎: Бэрыль (мінэрал)
български: Берил
bosanski: Beril
català: Beril
čeština: Beryl
kaszëbsczi: Beril
Чӑвашла: Берилл
dansk: Beryl
Deutsch: Beryll
Ελληνικά: Βήρυλλος
English: Beryl
español: Berilo
eesti: Berüll
euskara: Berilo
فارسی: گوشنیت
suomi: Berylli
français: Béryl
Gaeilge: Beiril
galego: Berilo
עברית: בריל
हिन्दी: बेरिल
hrvatski: Beril
magyar: Berill
Հայերեն: Բերիլ
Ido: Berilo
italiano: Berillo
日本語: 緑柱石
ქართული: ბივრილი
қазақша: Берилл
한국어: 녹주석
Latina: Beryllus
lietuvių: Berilas
latviešu: Berils
മലയാളം: അക്വാമറൈൻ
မြန်မာဘာသာ: မြ
Plattdüütsch: Beryll
Nederlands: Beril
norsk nynorsk: Beryll
norsk: Beryll
português: Berilo
română: Beril
русский: Берилл
саха тыла: Берилл
srpskohrvatski / српскохрватски: Beril
සිංහල: තරිප්පු
Simple English: Beryl
slovenčina: Beryl
slovenščina: Beril
српски / srpski: Берил
svenska: Beryll
தமிழ்: பெரில்
ತುಳು: ಪಚ್ಚೆ
ไทย: เบริล
Türkçe: Beril
ئۇيغۇرچە / Uyghurche: يېشىل ياقۇت
українська: Берил
oʻzbekcha/ўзбекча: Berill
Tiếng Việt: Beryl
Wolof: Beril
中文: 綠柱石