Opal’s play-of-colour is a lyrical dance: sometimes a grand jeté of bold, broad flashes of colour or smaller, quicksteps of pinpoint flashes.
Read MoreNature gives us a brilliant palette of colour-changing leaves and a spectacular kaleidoscope of colourful sunsets during the autumn season.
Read MoreThe fashion trend of colourblocking can be found in the artistic combinations of colour in multicoloured gemstones known for their colour zoning or banding.
Read MoreThese red, pink and orange hued gems evoke passion and excitement – and are sure-fire accessories for sultry summer days.
Read More
The first documented UV-reactive chemical treatment to make opal appear tenebrescent.
Read MoreA simple test easily detected dye treatment in fire opal.
Read MoreGemmological and chemical analysis of bright green gem-quality opal from Tanzania.
Read MoreAn examination of play-of-colour opal from Mexico and its variety of inclusions.
Read More
Commercial quantities of gem-quality chrysoprase and green prase opal (nickel-bearing chalcedony and common opal, respectively) have been recovered from altered serpentinite deposits near Haneti, Tanzania.
Read More
