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Introduction
Polychrome tourmaline is a unique and unusual variety of tourmaline, admired for its multicolored characteristics. These stones, featuring two or more shades, are highly prized by jewelers and collectors.
History and Origin
Discovered in 1703 by geologist Grossular Beyer Marinus de Lair in Namibia, polychrome tourmaline quickly intrigued European scientific circles. Found globally, including in Brazil, Afghanistan, Mozambique, and Nigeria, each deposit imparts unique color combinations to the stone.
Physical and Chemical Properties
These tourmalines form in hydrothermal soils with a magmatic origin, resembling an unprocessed pencil in shape. The colors range from smooth transitions to abrupt changes, creating various combinations. Physically similar to other tourmaline types, they have a glassy shine, high hardness, a constant magnetic field, and an electric charge. Their chemical formula is (Ca,K,Na,▢)(Al,Fe,Li,Mg,Mn)_3(Al,Cr,Fe,V)_6(BO_3)_3(Si,Al,B)_6O_18(OH,F)_4.
Symbolism and Meaning
In magic, polychrome tourmaline is believed to protect against witchcraft and negativity. It's thought to unlock creativity and talent but isn't suitable for everyone, especially pregnant women and allergy sufferers.
Use in Jewelry and Design
Valued in jewelry making, polychrome tourmalines are often cut into octagon or baguette shapes to enhance color transitions. Stones like watermelon tourmaline are formed into plates with natural edges to preserve their original beauty.
Care and Maintenance
Tourmaline ranks 7 to 7.5 on the Mohs scale with fair toughness. It's stable to light and most chemicals, but heat can alter color and cause fracturing. Cleaning with warm, soapy water is recommended, avoiding ultrasonic and steam cleaners.
Interesting Facts
Polychrome tourmaline is unique for its three-sided prisms.
Watermelon Tourmaline mimics the fruit in coloration.
First discovered in Maine in 1820.
Legend states it passed through a rainbow, gaining its colors.
Bicolor or zoned crystals are particularly desirable.
Occurs in more shades than any other gemstone.
Conclusion
Polychrome tourmaline, with its history, varied hues, and usage in jewelry, remains a fascinating and valued stone globally.
#Tourmaline #Polychrome