This gemstone called moissanite can easily pass as a diamond on a diamond tester. So, between a moissanite and a diamond, how do you tell the difference? Moissanites are generally sparklier than a diamond because it reflects more light and has stronger flashes of rainbow color, which can make it look unnatural, giving it that fake diamond look. They also have a yellow, green, or grayish hue. Their facets are not as sharp as a diamond because moissanite is doubly refractive, whereas a diamond is singly refractive. Get Your Diamonds Tested at: Christine Jewellers 1280-4151 Hazelbridge Way Richmond, BC, Canada Shop online at christinejewellers.com (link in bio) #diamondtester #diamondtesting #diamondtest #testingdiamonds #diamondrings #diamonds #vancouver #vancouverbc #richmondbc #yvr #greatervancouver