Some natural opals, mostly from Ethiopia, show a macroscopic finger-like structure called a digit pattern. This pattern consists of vertical columns that are more or less parallel, separated by a ...

A private collection of opals is slowly making its way around the world being shown privately to collectors. The hoard consists of 12 uncut, untreated black opals of varying shapes and sizes acquired ...

The cutting and fashioning of gemstones is an art. It is often forgotten that while there is an inherent beauty in the crystal nature of transparent gemstones, this is not always present in the opaque ...