Albite
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Albite is a plagioclase feldspar mineral. It is the sodium endmember of the plagioclase solid solution series. It represents a plagioclase with less than 10% anorthite content. The pure albite endmember has the formula NaAlSi
₃O
₈. It is a... Wikipedia
Chemical formula: NaAlSi 3O 8
Twinning: Common giving polysynthetic striae on, or, also contact, simple and multiple
Cleavage: Perfect on, very good on, imperfect on
Color: White to gray, blueish, greenish, reddish; may be chatoyant
Crystal system: Triclinic
Fracture: Uneven to conchoidal
Luster: Vitreous, typically pearly on cleavages