DIAMOND GUIDE (draft)
At SARAH & SEBASTIAN we take a pragmatic and transparent approach when it comes to engagement and wedding rings. We understand that the process can be over-romanced and under-informed, with an abundance of choice on the market and limited or misleading information.
For us the starting point is always the diamond. We have a trained team of jewellers, diamond graders and gemologists who are passionate about choosing the most beautiful, ethically sourced, GIA certified stones. We’re firm believers in quality over quantity and will never compromise on the stones we choose.
We handpick our diamonds specifically for each client’s engagement ring to ensure we have sourced the best possible stone at that time. This means no two of our rings are ever the same and we can work closely with our clients to meet their requirements and budgets.
Below you will find a guide explaining diamond properties and how these relate to each grading system. If you have any further questions outside of the stipulated information, please contact us as we have diamond graders and gemologists available to answer any question you may have.
The “Cut” of a diamond is the most important factor of a diamond’s appearance. Although colour and clarity are important factors for diamond value, the allure and beauty of a particular diamond depends more on cut quality than anything else. Cut refers to the way the facets of a diamond interact with light and how bright and lively it appears, which can be noticed without any formal training. Cut relates directly to the diamond’s fire, sparkle and brilliance.
Our priority is to offer a diamond that is well proportioned, aiming to feature an ‘Excellent’ to ‘Very Good’ cut grade. When choosing a diamond, our gemmologist will also consider the ‘spread’ of the stone, ensuring the proportions are still within the SARAH & SEBASTIAN parameters while sourcing the largest ‘face up’ appearance of the stone within the client's desired carat range.
A carat refers to the total weight of a diamond; this translates into the diamond’s physical size. Essentially, diamond carat weight is the measurement of how much a diamond weighs. A metric “carat” is defined as 0.2 grams.
All else being equal, diamond price increases with carat weight, because larger diamonds are more rare and more desirable. But two diamonds of equal carat weight can have very different values (and prices) depending on three other factors within the 4Cs: Clarity, Color, and Cut.
It’s important to remember that a diamond’s value is determined using all of the 4Cs, not just carat weight. For diamonds that are equal in every way, diamond value increases as weight increases. At certain weight boundaries, occasionally called “magic sizes,” the price per carat increases significantly. That’s because these boundaries or thresholds coincide with popular weights, and popularity means greater demand and therefore higher prices for these weights. This is especially true at the magic one-carat size. SARAH & SEBASTIAN is pleased to source diamonds in any carat weight above 0.5ct within our parameters of the 4c’s.
Our champagne diamonds are ethically sourced from Australia’s renowned Argyle Mine in Western Australia. We are proud to celebrate a stone that shares the same heritage as our brand, and captures the natural hues and warm tones of the Australian landscape.
Australian champagne diamonds are graded against the Argyle Colour Grading Scale, ranging from a light Beige (C1) to dark chocolate (C7) in colour. The colouring is 100% natural, providing each stone with a unique shade and increased rarity.
SARAH & SEBASTIAN source C3 - C4 champagne diamonds which have been carefully selected to complement the warm tones of yellow and rose gold, and cut specifically to maximize colour and brilliance.