Sapphirine

Sapphirine is a rare mineral, a silicate of magnesium and aluminium with the chemical formula (Mg,Al)8(Al,Si)6O20 (with iron as a major impurity). Named for its sapphire-like colour, sapphirine is primarily of interest to researchers and collectors: well-formed crystals are treasured and occasionally cut into gemstones. Sapphirine has also been synthesized for experimental purposes via a hydrothermal process.
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Noun
1. a rare light blue or green mineral; consists of aluminum-magnesium silicate and occurs as small grains in some metamorphic rocks
(hypernym) mineral
Adjective
1. made of or resembling sapphire
(pertainym) sapphire

(n.)
Resembling sapphire; made of sapphire; having the color, or any quality of sapphire.
  

General Information:
 Chemical Formula:
(Mg,Al)8(Al,Si)6O20
 Composition:
(Molecular Weight = 683.33 gm)
Magnesium 21.34 % Mg
Aluminum 25.67 % Al
Silicon 6.17 % Si
Oxygen 46.83 % O 
 Empirical Formula:
Mg6Al6.5Si1.5O20
 Environment:
Magmatic and metamorphic rocks.
 Locality:
St. Urbain, Charlevoix Co., Quebec, Canada.
 Name Origin:
Named after its blue color.
Physical Properties:
 Cleavage:
[010] Perfect
 Color:
blue, bluish gray, greenish gray, or green.
 Density:
3.42 - 3.48, Average = 3.45
 Diaphaniety:
Transparent
 Habits:
Granular - Generally occurs as anhedral to subhedral crystals in matrix., Tabular - Form dimensions are thin in one direction.,
 Hardness:
7.5 - Garnet
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
white
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sapphirine /'sæfərain/
tính từ (thuộc) xafia; như xafia; trong xanh như ngọc xafia
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