Matrix opal from Andamooka, in South Australia, is a precious opal-included porous rock that is commonly color enhanced (carbon impregnated) to imitate the highly prized black opal from Lightning ...

Sales of colour gemstone jewellery decreased modestly (1.5 per cent) on a year-on-year comparison, while silver and alternative metals jewellery revenue declined sharply by 24 per cent. Finally, sales ...

The slim sports watch is known as the Land-Dweller. It is highlighted by a thin 9.7mm case integrated with a flat link bracelet. It is available in white gold, platinum, Oystersteel, or Everrose gold ...

The chemical substance chlorine damages metal materials while producing undesirable color changes on both gold and silver ... The maintenance needs of gemstones vary because opals together with pearls ...