Archive for October 2018 | Monthly archive page

October has two birthstones: Opal and Tourmaline

Opal

Opals are formed as water seeps and flows through natural cavities in stone and fossil. The water absorbs silica from neighboring mineral deposits and the silica dioxide finds new homes in these crevasses. The spherical structure of the SiO2 forms elegant rows that develop into light refracting precious opals. Different parts of the world produce distinct opal characteristics, most notably → Read more