Tag: Heat Treatment

• Zeal of Zircons

  

  The Misrepresented Zircon Zircon, chemically known as ZrSiO4, is the oldest mineral of the earth originating from all three different rock types: igneous, metamorphic and sedimentary. Zircons also have an immense variety of facts such as: being in the tetragonal crystal system, being doubly refractive and having a high birefringence. Despite these facts, the most…

  Publication, Zircon

  Australia, Beauty, Blue, Colourless, Diamond, Dispersion, Fire, Gem Monarchy, Gemstone, Heat Treatment, Jewel, Jewellery, Monarchy, Red, South Africa, Sri Lanka, The Gem Monarchy, TheGemMonarchy, Zeal, Zircon, Zircons

• Ceylon Sapphires: The Pearl of the Indian Ocean

  

  The Name: Ceylon Ceylon was initially known as Ceilão, a name given to Sri Lanka by Portuguese colonisers in 1505. The British then re-colonised the land in 1798, transliterating Ceilão into English as Ceylon. Sapphires found in Ceylon were originally famous because of the vibrant medium blue hues, however, there is more to the opinion…

  Publication, Sapphire

  Adam, Aluminium Oxide, Asterism, Australia, Blue, Britain, British, Ceylon, Chromium, Colour Change, Corundum, Engagement, Eugenie, Gem Monarchy, Heat Treatment, India, Mining, Monarchy, Padparadscha, Pink, Portuguese, Princess, Purple, Red, Ring, Ruby, Sapphire, Sri Lanka, Star of Adam, Star Sapphire, Thailand, The Gem Monarchy, TheGemMonarchy, Vietnam, Yellow