Calcite - Optical - Cut and Polished (Ref OC8)

£ 17.00
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Calcite - Optical - Cut and Polished (Ref OC8)

Actual piece

Cut and Polished

Crystal’s Weight 18.4g

Size approximately 3 x 2.1cm

A single Calcite crystals can display an optical property called birefringence, which is when a ray of light enters the mineral, it is divided into two rays that diverge, (Double refraction ), this causes ‘words’ or ‘objects’ viewed through a clear piece of Calcite to appear doubled.

This type of Calcite is usually prepared cut at an angle, a bit like a ‘crooked house’.  


Calcite is a calcium carbonate mineral. Calcites are among the most varied and abundant crystals, and they occur in a wide variety of forms and colours.  Calcite makes up the major part of most marbles and limestones. Calcite crystals are found on every continent. Large deposits of brightly coloured Calcites occur in Mexico, and some of the most desired forms, such as Stellar Beam Calcites, are found in the USA.