As a radiologist, writing a review on mexican opals was perhaps the last thing I expected to be doing, but having fallen in love with this most beautiful and diverse of gemstones, and given the paucity of...
I have collected rough gemstones for most of my life. For most of my early adulthood I wore mostly silver jewellery with black onyx or garnets, but collected loose tumbled gemstones of all types, precious as...