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Properties and Virtues of Sodalite

  • March 8, 2019
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Sodalite, a deep blue veined with white, seduced by its appearance of soft snowy night but it is often considered with a little condescension: it often passes for a poor relative of the magnificent lapis lazuli whose ancient history amazes us. However, sodalite, it is true more discreet, can surprise us and sometimes hides wonderful powers.

Mineralogical Characteristics of Sodalite

In the great group of silicates, sodalite ranks in feldspathoid tectosilicates. It is a subgroup close to feldspars but with different physical and chemical properties: their low silica content makes them much less dense minerals. Aluminum comes into abundance in their composition, hence the scientific designation “aluminosilicate”. In addition, sodalite is characterized by a very high sodium content accompanied by chlorine.

Sodalite enters the family of “outremers”. This name evokes the Mediterranean origin of lapis lazuli. Lapis lazuli is a combination of several minerals. There is mainly lazurite, also classified in overseas, sometimes accompanied by other similar minerals: haüyne and sodalite. Calcite and pyrite also enter into its composition. Pyrite, which gives golden reflections to lapis lazuli, is very rarely present in sodalite.

Sodalite is found in rocky, silica-poor environments that arise from volcanic activity: in magmatic rocks such as syenite or in ejections from volcanoes during eruptions. It is also present in meteorites. It occurs most often in grains isolated in the rock or in massive aggregates, quite rarely in the form of separate crystals.

The colors of Sodalite

Ornamental stones, statuettes and cabochon or faceted gemstones are usually pale blue to midnight blue, often veined with white limestone giving a cloudy or filamentous appearance. Sodalites can also be white, pink, yellowish, greenish or reddish, more rarely colorless.

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The Provenances of Sodalite

There are quarries in these different countries and regions:

  • Canada, Province of Ontario: Bancroft, Dungannon, Hastings. Province of Quebec: Mont Saint-Hilaire.
  • USA, Maine, Montana, New Hampshire, Arkansas.
  • Brazil, State of Ebahi: Blue quarries from Fazenda-Hiassu to Itaju do Colonia.
  • Russia, kola Peninsula in eastern Finland, Urals.
  • Afghanistan, Badakhshan Province (hackmanite).
  • Burma, Surroundings of Mogok (hackmanite).
  • India, State of Madhya Pradesh.
  • Pakistan (rare presence of crystals with pyrite).
  • Tasmania
  • Australia
  • Namibia (transparent crystals).
  • West Germany, Eifel Mountains.
  • Denmark, South Greenland: Illimaussacq
  • Italy, Campania: Somma-Vesuvius complex
  • France, Cantal: Menet.

The Darkness of Sodalite

Sodalite has a rare luminescence phenomenon called darkness or reversible photochromism. This characteristic can be seen even more in a pink variety called hackmanite , named after the Finnish mineralogist Victor Hackmann. Afghanistan’s hackmanite is pale pink in ordinary light, but becomes intense pink in bright sunlight or under an ultraviolet lamp.

Placed in the dark, it keeps the same luster for a few moments or a few days thanks to the phenomenon of phosphorescence. Then, it loses its spectacular color like a rose that fades. The process is repeated at each experiment on the same specimen.

The opposite phenomenon is observed with the hackmanite of Mont Saint-Hilaire in Canada: its beautiful pink turns greenish under the UV some sodalites coming from India or Burma turn orange and take mauve reflections to the extinction of the lamps.

The atoms of the mineral absorb the ultraviolet rays and then send them back in this surprising way. This phenomenon, almost magical, is very random, it can be observed in some sodalites while others appearing identical and coming from the same place will not produce it.

Other Sodalites

  • Sodalite ” alomite  ” is sometimes called  Charles Allom, a large quarry owner in the early 20th century in Bancroft, Canada.
  • The ditroïte is a rock composed among other sodalite so very rich in sodium. It owes its name to its source: Ditro in Romania.
  • The molybdosodalite is an Italian sodalite containing molybdenum oxide (metal used in the metal).
  • The synthetic sodalite is marketed since 1975.

Etymology of the word “Sodalite”

In 1811 Thomas Thomson of the Royal Society of Edinburgh gave his name to Sodalite and published his scientific memoir:

The name Sodalite is thus composed of “soda” (“soda” in English) and ” lite” (of lithos , Greek word designating the rock or the rock). The English word soda comes from the same medieval Latin word soda , itself derived from the Arabic surwad designating a plant whose ash was used to make soda. The soda, a soft drink, is for its part, and for the record, the abbreviation of ” soda-water ” (“water of soda”).

Sodalite through history

Sodalite in ancient times

Sodalite was discovered and described in the early nineteenth century. But that does not mean she was unknown before. The lapis lazuli of antiquity, used in abundance by Egyptians and other Mediterranean civilizations, comes from the Badakshan mines in Afghanistan from where sodalite is still extracted today.

One may think that sodalite is not particularly sought after because ancient texts do not speak about it. Pliny the Elder thus describes only two blue stones: on the one hand, the sapphirus with small golden spots which certainly relates to lapis lazuli with its inclusions of pyrite. On the other hand, cyanus mimicking the blue sky that would be the sapphire.

However, the Romans knew very well a variety of sodalite but this one is not of a remarkable blue color. Often greyish or greenish; it can sometimes show great clarity. This is the sodalite of Vesuvius. 17,000 years ago the volcano “mother” Somma collapses and gives birth to Vesuvius. The sodalite present in the lava rejected by Vesuvius is the result of this great reshuffle.

The eruption of 79 CE Vesuvius that buried Pompeii and Herculaneum was fatal to Pliny the Elder. The naturalist writer, victim of his indefatigable curiosity, perished for approaching the volcano too closely and shared the fate of thousands of victims.

In the 19th century, grained sodalites, identical to those of Vesuvius, were discovered on the shores of Lake Albano, near Rome. The mountain that encloses this lake is certainly an old volcano. Taquin le Superbe, the last king of Rome had a temple dedicated to Jupiter built at 500 BC. There are still some remains but the mountain of Albano also keeps other memories: the place is covered with volcanic minerals.

Livy, Roman historian of the 1st century AD, reports an event that would have occurred long before him and that seems to evoke the sodalite: “the earth opened at this place forming a horrible pit. From the sky there fell stones in the form of rain, the lake flooded all the countryside …“

Sodalite in Pre-Columbian Civilizations

In 2000 BC JC, the civilization of Caral in the north of Peru uses sodalite in its rituals. On the archaeological site, offerings were found composed of fragments of sodalite, quartz and uncooked clay figurines.

Much later (1st to 800 AD), the Mochica civilization left amazing gold jewelry where sodalite, turquoise and chrysocolla make up tiny mosaics. At the Larco Museum in Lima, you can see earrings depicting warrior birds on a shade of blue. Others are adorned with alternating tiny lizards of gold and sodalite.

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Sodalite in the middle Ages and the Renaissance

From the fourteenth century, lazurite was first extracted from lapis lazuli and transformed into ultramarine blue pigment. The translucent blue color of sodalite is unusable and is therefore useless for this use. Sodalite remains very discreet at this time.

Sodalite in the Modern Period

In 1806, Karl Ludwig Giesecke, a Danish mineralogist, reports various minerals from a trip to Greenland, among which is the future Sodalite. A few years later, Thomas Thomson also gets samples of this mineral, analyzes it and gives it its name.

At the same time, Polish Count Stanislaw Dunin-Borkowski studied the Sodalite of Vesuvius that he picked up on the slope named Fosse Grande. He immerses fragments of this stone of great clarity in nitric acid and finds that a white bark forms on their surface. Powdered, sodalite gels in acids.

After comparing the analyzes and the experiments, the Greenland stone and the Vesuvius stone are declared to be of the same species.

Canadian Sodalite

In 1901, the Princess of Wales Mary, wife of the future George V, visited Buffalo World’s Fair and particularly admired the sodalite of Bancroft, Canada’s mineral capital . 130 tons of rock is shipped to England to decorate the princely home at Marlborough (now the seat of the Commonwealth Secretariat). Since then, Bancroft’s sodalite careers have been called “The Princess’s Mines”.

It seems that the nickname “Blue Princess” was given as a tribute to another member of the British royal family at the time: Princess Patricia, Queen Victoria’s granddaughter, who is particularly popular in Canada. From this time, blue sodalite becomes fashionable, watchmaking for example; it is often used for the dial of luxury watches.

Since 1961, the Bancroft quarries have been open to the public. The “Farm Rock” is a very nice place of the site. Like farms offering free picking of fruits and vegetables, this place allows everyone to harvest sodalite for an affordable price by weight. You choose and extract your treasures yourself: small collection samples or large pieces to decorate the garden. The bucket is provided; the only obligation is to have good closed shoes!

The Virtues of Sodalite in Lithotherapy

In the middle Ages, sodanum, probably extracted from a plant, was a soda remedy used against headache. Lithotherapy finds this beneficent effect with sodalite. It helps to lighten thoughts, soothes tensions and useless feelings of guilt. By removing the pain, it favors meditation and satisfies in harmony our search for ideal and our thirst for truth.

The Benefits of Sodalite against Physical Injuries

  • Stimulates the functioning of the brain
  • Balance the blood pressure
  • Regulates the endocrine balance: Favorable action on the thyroid, the production of insulin …
  • Attenuates calcium deficiencies (spasmophilia)
  • Calm panic attacks and phobias
  • Promotes sleep of babies
  • Removes stress from pets
  • Soothes digestive disorders
  • Calm the hoarseness
  • Increases vitality
  • Neutralizes electro-magnetic pollution

The Benefits of Sodalite on Psychism and Relational

  • Organizes the logic of thought
  • Promotes concentration and meditation
  • Helps to control emotions and excess sensitivity
  • Facilitates speech
  • Promotes self-knowledge
  • Restores humility or on the contrary removes feelings of inferiority
  • Facilitates group work
  • Develop solidarity and altruism
  • Reinforces loyalty to one’s convictions

Sodalite is associated, in priority, with the 6th chakra, the chakra of the 3rd eye (seat of consciousness).

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Purification and Reloading of Sodalite

The spring water, demineralized or simply running water will suit perfectly. Avoid salt or use it very occasionally.

For reloading, no sun: prefer the light of the moon to recharge the sodalite or place it inside an amethyst geode.

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  • April 24, 2015
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  • April 24, 2015
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