I have bought simulants from XY Company in Sydney – very average stone, but the good setting. In my opinion, I wouldn’t buy one again. Bought a pendant from XY Company, the stone was disgusting and the setting about as solid as a paperclip. The production line service is really bad. Looks good on my puppy though! I’ve quoted my purchases from Gordan Max several posts ago. I’m addicted. I think these stones have more shine, more brilliance, more refraction, more everything but price. It’s the colour (D), cut and clarity (IF) that make them more beautiful than your average natural diamond. So, yes there is a visible difference, but it’s a beautiful one. Oh, there is no visible difference when using a jeweller’s loop either. Perfect or average, your choice.
– BLOG: http://forums.vogue.com.au/showthread.php?t=174131&page=12