A Guide to diamonds

At MIRAYAMA, we believe that the beauty of diamonds should never come at the cost of harming the environment. That's why we use only the highest quality natural diamonds, ethically sourced from reputable mines that adhere to strict environmental and social standards. Every piece of jewellery that we sell is certified for quality and authenticity by leading independent laboratories, ensuring that you can wear your MIRAYAMA jewellery with confidence, knowing that it has been rigorously tested and verified.

We take pride in offering an extensive range of jewellery that has been meticulously crafted to meet the highest standards of quality and design. Each piece is made using the finest materials and is expertly finished to create timeless, elegant and luxurious jewellery that will stand the test of time.

The Four C's

Chances are you’re familiar with the four Cs: carat, cut, clarity and color, used to grade diamonds and determine a stone’s value. These four characteristics are used by gemologists and appraisers to evaluate the quality of a diamond and determine its value. When considering a diamond, it is important to balance the Four Cs, taking into account personal preferences, budget, and the overall look of the piece.


A diamond's weight is measured in carats, with one carat equaling 0.2 grams. The carat weight of a diamond affects its size and price, with larger diamonds being more valuable.


A diamond's cut refers to its shape, proportions, and symmetry, and how well it has been cut to bring out its natural brilliance and sparkle. A well-cut diamond will reflect light better and appear brighter and more brilliant than a poorly cut diamond.


A diamond's clarity refers to the presence of internal and external blemishes or inclusions. The fewer and smaller the inclusions, the more valuable the diamond. Clarity is rated on a scale from "Included" (I1) to "Flawless" (FL).


A diamond's color is judged on a scale from "D" (colorless) to "Z" (light yellow or brown). The more colorless a diamond is, the more valuable it is. A completely colorless diamond is rare and highly sought after.