Optical Calcite is a double refractive mineral, meaning that it bends light making objects appear as though theyre in two places at once. Naturally formed into parallelograms, this Calcite variety is usually completely transparent and has endless amounts of rainbow inclusions within them.
This stone as a fascinating legacy, compounding our use and belief in crystals throughout human history.
This form of calcite is also known as 'Iceland Spar'. It is believed that the Vikings used this stone during voyages for its light-polarizing ability, allowing them to always be able to find the sun no matter the weather. Historians also believe Medieval Icelandic texts that refer to 'sunstone' is actually Iceland Spar; further evidence of this is the 1592 shipwreck 'Alderney', which has been found with an Iceland Spar in its buried contents.
Iceland Spar was also involved in understanding light as a wave. This was studied at great lengths and Augustin-Jean Fresnel published the complete explanation of Iceland Spars light polarization effect in the 1820s. This was followed by William Nicol who used Iceland spar when inventing the very first polarizing prism in 1828, called the Nicol Prism. It involved a piece of Iceland Spar cut at a 68 degree angle and Nicol Prisms were once widely used in microscopy and polarimetry!
Metaphysically speaking, we harness Optical Calcite for its clarity, illuminating negative patterns and guiding us with positive energies - just like the generations before us. Calcite connects the emotions to the intellect, ehancing emotional intelligence and bringing optimism and motivation into your life. It is a stabilising stone, increasing trust in your own abilities and trust in others. Supporting you overcome setbacks that you may encounter on you path.
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