The Calcic, middle-range member of the plagioclase feldspars, labradorite seldom forms crystals, but when crystals do occur, they are tabular. It most often occurs in crystalline masses that can be microscopic or up to a meter or more across, and is commonly characterized by its ‘schiller’ effect – a rich play of iridescent colors, principally blue, on cleavage surfaces. Crystals that display this effect are used as gemstones, cut as cabochon.
The ‘schiller’ effect is caused by the scattering of light from thin layers of a second feldspar that develops through internal chemical separation during the cooling of what was originally a single feldspar. The base color of labradorite is generally blue or dark grey, but can be colorless or white.
Historically, labradorite was discovered at the end of the eighteenth century on a Canadian peninsula of Labrador after which it was named. It is said to be very effective in alleviating bone problems, disorders of the spinal column, and wear and tear of the joints.
Psychologically, labradorite has a calming, harmonizing effect, spiritual connection, transformation, brings clarity, peace and progression to the wearer. Labradorite improves intuition and clarifies the possessor’s own views and objectives.The stone is the linked to the star sign of Aquarius and is most commonly found in Finland, United States, Canada, Madagascar, Australia, Russia, and Mexico.
*Reprinted from various rock/mineral & crystal books, websites.
