![]() You’ll tend to notice this more when you look at your engagement ring in low lighting conditions. The white card in comparison just looks ‘wiped out’.įire, on the other hand, is light dispersed across a diamond that exhibits flashes of rainbow colours. Think of it like a chessboard compared to a plain white card the former will seem brighter because when it’s moved, the black and white squares create contrast. If you look at a diamond face up, you’ll see that the facets create some areas of brightness and some areas of shadow the trick for the cutter is to achieve a good, symmetrical balance of both. The contrast of light and dark areas is also an important factor. Diamonds with shallow crown angles and large tables exhibit the best brilliance. Diamonds that are cut too deep or not deep enough will leak light from the back of the stone rather than reflecting it face-up, which will make them seem duller. A diamond’s brilliance is made up of bright and darker areas, which is why a good cut is so important to achieve good brilliance. And that’s what gives a diamond its fire and brilliance, or ‘sparkle’.īrilliance is the colourless light that is reflected from a gem, and is only used in reference to transparent stones like diamonds (not coloured gems). Proportions and facets affect how much light can enter the stone and how much of that light can be refracted back out of the stone. It’s not an easy job! The reason for this strict attention to detail is not just to create a diamond that looks good. The parameters are different for each shape, but cutters will strive for symmetry, good proportions, the correct length to width ratio, and the correct number of facets at the correct angles, all while maintaining the durability and beauty of the gemstone. ![]() Once that’s done, the diamond is cut into its final shape – round brilliant, princess, emerald, etc. This depends entirely on the individual characteristics of each stone, and it requires seriously expert-level skill. After being weighed and verified, each diamond is thoroughly analysed for internal inclusions and faults to determine how best to cut it and what shape and carat size (as well as other features) the final gem will take. When they come out of the mine first, they look more like a chunk of glass rock than the perfect little jewel that sits on your finger. ![]() To understand the two most common – fire and brilliance, we first need to understand what exactly gives diamonds their characteristic sparkle. Jewellers also have many works to describe how a diamond shines, but they’re much more technical (no surprise there). Us ordinary folk may describe a diamond as ‘sparkly’, ‘dazzling’, ‘glimmering’, or even ‘twinkling’. Jewellers and gemologists like to use lots of fancy terminology to describe diamonds and gemstones. But what do they mean, and what’s the difference between the two? Allow us to explain… If you’re on the hunt for an engagement ring, you’ll hear these two terms all the time.
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