The quality of colour can be dissected into vibrancy, evenness, pattern and, in some cases, uniqueness; however, what on earth causes it? This series is dedicated to exploring the different causes of colour in gemstone minerals. STACEY LIM reports. Read more »

Will the Australian opal industry ever outgrow its association with poor quality, mass-produced triplet jewellery? And what about those rumours that opal is bad luck? Megan Austin goes digging. Read more »