Because the gemological properties for this new material are out of range for natural opal (SG of 2.00 and RI between 1.37 and 1.47), it is best described as an imitation opal. Further testing ...

Because synthetics for jewelry applications can be “made to order ... without distorting the stacked arrangement that creates opal’s play-of-color. Since there is not enough natural alexandrite to ...

Nature continues to prove that it is the ultimate artist, crafting beauty that defies imagination. A recent discovery in ...

As long as we can distinguish between LGD and the real thing, there will still be a natural diamond ... with an 8.80ct black Australian opal, courtesy of Kreis jewellery. GemGenève exhibitions ...