Blue Labradorite prong set pendant

Blue Labradorite prong set pendant necklace, hanging from a sterling silver chain.
 
Approximate size at widest points is 40mm x 30mm.
 
Labradorite is a Feldspar Mineral. It demonstrates the phenomena of Labradorscence which exhibit flashes of blue, green, red, purple, orange and yellow. Now Labradorscence isn’t a display of colours – it is a reaction with light. When light enters the Stone it strikes the twinning surface. The flash of colour/colours you see is the light being reflected from the twinning surface. Different surfaces will give different colour reflections.