The Four Cs are important considerations when purchasing a diamond: carat (weight), cut (brilliance), color (rated D to Z), and clarity (imperfections). Make sure the diamond is verified by reliable labs such as GIA or IGI. Decide on a setting and shape that complement your own style, and set a spending limit. Dishis Designer Jewellery is well known for providing superb customer service along with diamonds that are ethically sourced and of the highest caliber.