Prismatic to tabular crystals; radial, columnar; granular to compact massive
Twinning
Rare
Cleavage
Imperfect on {0001}
Fracture
Conchoidal to irregular
Tenacity
Brittle
Mohs scale hardness
7.5–8.0
Luster
Vitreous to resinous
Streak
White
Diaphaneity
Transparent to translucent
Specific gravity
2.63–2.92
Optical properties
Uniaxial (−)
Refractive index
nω = 1.564–1.595 nε = 1.568–1.602
Birefringence
δ = 0.0040–0.0070
Pleochroism
Weak to distinct
Ultraviolet fluorescence
None (some fracture-filling materials used to improve emerald's clarity do fluoresce, but the stone itself does not). Morganite has weak violet fluorescence.
References
[2][3][4][5]: 112
Beryl (/ˈbɛrəl/BERR-əl) is a mineral composed of beryllium aluminium silicate with the chemical formula Be3Al2Si6O18.[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 frequently tinted by impurities; possible colors are green, blue, yellow, pink, and red (the rarest). It is an ore source of beryllium.[7]
^"Beryl". mindat.org. Archived from the original on 26 October 2007.
^"Beryl Mineral Data". webmineral.org. Archived from the original on 12 May 2008.
^"Beryl" (PDF). Mineral Data Publishing. 2001. Archived (PDF) from the original on 28 November 2011.
^Schumann, Walter (2009). Gemstones of the World. Sterling Publishing Co. ISBN 978-1-402-76829-3. Archived from the original on 20 November 2017. Retrieved 22 May 2018.
^"Beryl". www.minerals.net. Retrieved 12 July 2018.
^Klein, Cornelis; Dutrow, Barbara; Dana, James Dwight (2007). The Manual of Mineral Science (after James D. Dana) (23rd ed.). Hoboken, N.J.: J. Wiley. ISBN 978-0-471-72157-4. OCLC 76798190.
Beryl (/ˈbɛrəl/ BERR-əl) is a mineral composed of beryllium aluminium silicate with the chemical formula Be3Al2Si6O18. Well-known varieties of beryl include...
The karabinek szturmowy wzór 1996 "Beryl" (English: assault rifle model 1996 "Beryllium") is a Polish 5.56mm assault rifle, designed and produced by the...
Red beryl, formerly known as bixbite and marketed as red emerald or scarlet emerald, is an extremely rare variety of beryl as well as one of the rarest...
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Sheila Beryl Grant Sim, Baroness Attenborough (5 June 1922 – 19 January 2016) was an English film and theatre actress. She was also the wife of the actor...
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Jane Beryl Wilde Hawking Jones (born 29 March 1944) is an English author and teacher. She was married to Stephen Hawking for 30 years. Jane was born to...
made two career-changing decisions – he purchased a ukulele, and married Beryl Ingham, a fellow performer who became his manager and transformed his act...
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Beryl Swain (née Beryl J Tolman, 22 January 1936 – 15 May 2007) was a female road racer of solo motorcycles from the London area. In 1962, she was the...
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and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium or sometimes vanadium. Beryl has a hardness of 7.5–8 on the...
Beryl Ingham (1901 – 24 December 1960) was the wife and manager of singer/actor George Formby, as well as being a variety performer and champion clogdancer...
Beryl Hodge. In 1950, after much dispute with Nicholson (whom he had not divorced yet), he married Beryl. Despite having a loving marriage with Beryl...
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Beryl the Peril (or simply Beryl) is a fictional character created by David Law, the creator of Dennis the Menace, for issue 1 of The Topper comic (dated...
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