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Beryl (/ ˈ b ɛr əl / BERR-əl) is a mineral composed of beryllium aluminium silicate with the chemical formula Be 3 Al 2 Si 6 O 18. [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 ...
The more common beryllium containing minerals include: bertrandite (Be 4 Si 2 O 7 (OH) 2), beryl (Al 2 Be 3 Si 6 O 18), chrysoberyl (Al 2 BeO 4) and phenakite (Be 2 SiO 4). Precious forms of beryl are aquamarine, red beryl and emerald. [15] [35] [36] The green color in gem-quality forms of beryl comes from varying amounts of chromium (about 2% ...
Berylliosis, or chronic beryllium disease (CBD), is a chronic allergic-type lung response and chronic lung disease caused by exposure to beryllium and its compounds, a form of beryllium poisoning.
Despite the similarity of their names, chrysoberyl and beryl are two completely different gemstones, although they both contain beryllium. Chrysoberyl is the third-hardest frequently encountered natural gemstone and lies at 8.5 on the Mohs scale of mineral hardness , between corundum (9) and topaz (8).
Kay Scarpetta, chief medical examiner of Virginia, gets involved in the case of a brutal stabbing death in Richmond of romance writer Beryl Madison. Then, Madison's greedy lawyer accuses Scarpetta of losing his client's latest manuscript, an autobiographical expose of Beryl's early life as protégé of a legendary novelist.
Phenakite or phenacite is a fairly rare nesosilicate mineral consisting of beryllium orthosilicate, Be 2 Si O 4.Occasionally used as a gemstone, phenakite occurs as isolated crystals, which are rhombohedral with parallel-faced hemihedrism, and are either lenticular or prismatic in habit: the lenticular habit is determined by the development of faces of several obtuse rhombohedra and the ...
The remnants of Hurricane Beryl dumped heavy rain on Vermont, washing away an apartment building, knocking out bridges and cutting off towns, and retraumatizing a state still recovering from ...
Pezzottaite, marketed under the name raspberyl or raspberry beryl, is a mineral species first recognized by the International Mineralogical Association in September 2003. Pezzottaite is a caesium analogue of beryl , a silicate of caesium, beryllium , lithium and aluminium , with the chemical formula Cs(Be 2 Li)Al 2 Si 6 O 18 .