Part 2 of identifying this gemstone which changes from red to green in different lights! Magic! In Part 1 we used our eye and our 10x loupe, this gave us lots of clues 😁. Gemmology is a science, it's a bit like CSI - we have to gather all the scientific clues and then use them to make a positive identification of the material. I am showing you how to use the Refractometer which is a very important piece of gem testing equipment, this will give us a reading of this materials Refractive Index. This material has an RI of 1.548 and is singly refractive, it changes from red to green in different lighting and you will see the swirly inclusions in Part 1. Drop your guess into the comments and follow us for the reveal in Part 3! #gemstones #red #green #testing #gemtesting #gems #refractometer #gemmology #gemology #identify #jewellery #jewellerydesigner #jewellerymaker #colourchange