Indicolite is a variety of tourmaline. It was named due to its indigo-blue color, which is usually dark, often almost black, and sometimes greenish-blue. The hardness of the stone is 7-7.5, and its luster is vitreous. The gem is rather fragile.
Blue tourmaline was used in jewelry since ancient times, but it was often not distinguished from other blue stones. Therefore, indicolite is also known as Brazilian sapphire or Ceylon sapphire. The blue coloring of indicolite is associated with the simultaneous presence of ferrous and ferric iron in its composition. In multi-color (polychrome) crystals of tourmaline, light blue, turquoise, or blue indicolite often forms specific areas along with the other colored varieties of this mineral. Indicolite itself is characterized with pleochroism, as its density and the hue of its coloring vary in different directions. The color of the crystals may vary from pale blue to bright blue in different directions; a hue of turquoise may come and go. The most common indicolites are colored in navy blue or ink blue. Thus, this mineral is often subjected to heat treatment to improve its appearance and add a beautiful blue or light blue tint to the crystals.
An emerald cut is commonly used in the processing of a tourmaline; a diamond or fancy cut occurs less frequently. All tourmalines darken and a kind of get dull in artificial light. They are most often used as jewelry inserts in pendants, brooches and earrings, and less often as such in rings because of the fragility of the mineral. Actually, it should be remembered that all varieties of tourmaline are rather difficult to cut.
Deposits of precious indicolite, as well as other colored tourmalines, are associated with pegmatite lodes. They are located in Namibia and Brazil, the United States (California) and Madagascar, Sri Lanka and Afghanistan.
Blue tourmalines have a peaceful, calming effect. They relieve one from the nervous tension and ease the consequences of stressful situations. The gem improves one’s sleep and releases from of insomnia and nightmares. For instance, a silver or gold pendant with indicolite simply put under the pillow or next to the bed will provide one with sound sleep. Light blue indicolite improves eyesight and soothes headaches. Also, wearing this stone is recommended at chronic pharyngitis, thyroid diseases, and speech disorders.
Like a lot of blue minerals, indicolite is used by yogis and astrologers to get information from the higher mind and find the spiritual path. It is recommended to put this mineral onto the area of the third eye to calm down the agitated mind. You can also put it onto the heart chakra to calm the heart full of rage or sadness. Indicolite also contributes to clear speech and accurate sound articulation. The gem is often used by singers, lecturers and mediums. You should wear it in the area of your neck and throat for this purpose.
Of all the varieties of tourmaline, indicolite is arguably the only one that can be worn constantly. However, you shouldn’t wear it for a long time as well. Also this is the only tourmaline for which a silver setting is acceptable for therapeutic purposes besides a gold one.
Actually, this mineral is not particularly harmful to anyone, though it is not quite beneficial for Capricorn. The gem is not recommended for the signs of the fire element as well.