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Two colour tourmalines are generically called bicolour tourmaline, as is the case of the popularly known as watermelon tourmaline, which is green and red or pink.

Among the most striking characteristics of this gem is the wide variety of colours. Thanks to the columnar and prismatic crystals of tourmaline, they can have different colours at both ends and a third colour in the centre. Or they can have one colour on the outside and others inside, distributed concentrically.  

How do the twelve tribes of Israel relate to birthstones? The writings of Flavius ​​Josephus (1st century) and Saint Jerome (5th century) connected the 12 stones on the breastplate with the 12 signs of the zodiac. The main idea was that each of the precious stones had special powers associated with the corresponding astrological sign that brought therapeutic benefits or would work as talismans.It wasn't exactly the modern concept of the gemstone of the month. In this astrological model, each person should have a collection of 12 different gems and use the appropriate stone during the ascension of the corresponding...

I have been asked several times about the origin of the birthstones.The idea of ​​assigning a gemstone to each month of the year is ancient, dating back to Abraham's celebrated breastplate, described in the book of Exodus, in the Bible.This piece of religious clothing had twelve precious stones, believed to represent the twelve tribes of Israel.The stones were placed in four rows of three each, which, according to one of the versions, would be:- Ruby, peridot and aquamarine- Turquoise, sapphire and emerald- Hyacinth, agate and amethyst- Topaz, onyx and jasper In the photo is the sculpture of Abraham, bearing the...

The typical inclusion of peridot are small halo crystals that take the form of water lily leaf, but it is also possible to find peridot inclusions in peridot, mica plates, chromite octahedrons and small chromospinela crystals   A inclusão típica do peridoto são uns pequenos cristais em halo que tomam a forma de folha de nenúfar, mas também é possível encontrar inclusões de peridoto em peridoto, placas de mica, octaedros de cromite e pequenos cristais de cromoespinela