عقیق احمر

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عقیق احمر
Polished carnelian/sard pebbles. Scale is in millimeters.
General
CategoryChalcedony variety
Chemical formulaSilica (silicon dioxide, SiO2)
Identification
Molar mass60 g / mol
ColorReddish-brown
Crystal systemTrigonal
CleavageAbsent
FractureUneven, splintery, conchoidal
Mohs scale hardness6 - 7
LusterVitreous, dull, greasy, silky
StreakWhite
DiaphaneityTranslucent
Specific gravity2.59 - 2.61
References[1]

حوالہ جات[ترمیم]

  1. Rudolf Duda and Lubos Rejl: Minerals of the World (Arch Cape Press, 1990)