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labradorite gem b t - Newest pictures

☹The Gemstone Labradorite☹

Labradorite is an important feldspargemstone. It often displays a beautiful iridescentplay of colors, which can move as the stone is rotated. Labradorite gemstones usually have a dark base color with metallic-looking color plays of blue, green, yellow, and red. This iridescenteffect is commonly known as labradorescence, and is named after this stone. It is caused by internal fractures that reflect light back and forth, dispersing it into different colors.
Chemical Formula(Na,Ca)1-2Si3-2O8
ColorBlue, Red, Green, Yellow, Brown, Purple, Gray, Multicolored
Hardness6 - 6.5
Crystal System Triclinic
Refractive Index1.560 - 1.568
SG2.69 - 2.72
Transparency Transparentto translucent
Double Refraction.008
Luster Vitreousto pearly
Cleavage2,1 - basal ; 2,1 - prismatic ; 3,1 - pinacoidal.
Mineral Class Labradorite( Anorthite)

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