Cylindrical central part from the regularly-dimensioned mine-shell has been removed, making it a perfectly spherical form. The leg is made of steel pipe (ca 200 mm thick), which also gives a visual balance to the same sized chimney. Authentic illuminators (from old ships) with bronze, brass or chromed-metal frames, heat resistant glass (diameter ca 45 cm/17.7 in) and heat-resistant joints are used as doors for the fireplace. Internal structures, interim plate and fire grate are made of cast iron. Ash pan is removable. The number and size of the illuminator doors is made according to customer’s wishes.