One thing to be aware of when attempting to recognize authentic gemstones from pretend ones is that serious gemstones commonly have flaws. This melts the elements which fall on to some plate and solidify into a crystal identified as a boule.[66] For corundum the flame has to be 2000 °C. https://benefits-of-wearing-ruby06059.blogdun.com/27311565/facts-about-semi-precious-stones-and-meanings-revealed