Labradorite is a feldspar mineral that is most often found in mafic igneous rocks like anorthosite, basalt, gabbro, and norite. Some specimens of labradorite exhibit a Schiller effect, which is a strong play of iridescent blue, green, red, orange, and yellow colors as shown in the photographs. The phenomenon in which Labradorite is so well known for (the spectacular displays of color) is known as "labradorescence." Specimens with the highest quality labradorescence are often selected for use as gemstones.
"Labradorescence is not a display of colors reflected from the surface of a specimen. Instead, light enters the stone, strikes a twinning surface within the stone, and reflects from it. The color seen by the observer is the color of light reflected from that twinning surface. Different twinning surfaces within the stone reflect different colors of light. Light reflecting from different twinning surfaces in various parts of the stone can give the stone a multi-colored appearance."
Labradorite was thought of by the Ancient Inuits as the Frozen Fire of the Aurora Borealis. Legends tell stories of an Inuit warrior who found a cave with the Aurora Borealis embedded within the rocks, on the shoreline of Labrador, Canada. The warrior attempted to release the Aurora Borealis with his spear but was unable to remove it all, leaving some of the light imprisoned in the rocks forever. The native inhabitants used the gemstone for medicinal purposes, and believed that it would increase their energy, while simultaneously relieving stress and anxiety.
Labradorite is an effective filter that deters harmful electromagnetic frequencies from negatively impacting the heart, body, and mind. Barrier filter crystals have incredible abilities to help us focus and amplify our efforts to keep undesirable elements out of our lives. The crystalline structure gives it strength in all directions, allowing it to provide barriers to attack from all directions simultaneously. Labradorite helps absorb positive energy flow while repelling negative energy helping us to keep our focus on things that are important and not dwelling on things we can not control.
References:
(Geology.com)
(CrystalVaults.com)