Legend has it that the Vikings used a na...  ...An Iceland spar, which is transparent and made of calcite , was found in the wreck of an Elizabe...

The Sahara Desert is growing, consequently reducin...  ...ous and fanciful plan to use bacteria to create a calcite wall on the desert's southern edge: Bacillus pas...  ...und in wetlands, and is able to chemically create calcite . By unleashing the bacteria on areas of the deser...