A princess cut diamond is a square or rectangular shaped diamond with an inverted pyramid shape and beveled edges. It is a popular choice for engagement rings for several reasons:

• Brilliance - The unique facet pattern of the princess cut, with its angled sides and pyramidal shape, maximises the diamond's brilliance and fire, creating an exceptionally sparkling and dazzling appearance.
• Finger Coverage - The square or rectangular shape of a princess cut tends to have a larger surface area compared to other cuts of the same carat weight, providing more finger coverage and giving the ring a more substantial, showy presence.
• Versatility - Princess cut diamonds can be set in a variety of engagement ring styles from solitaires to three-stone and halo designs, complementing different tastes and metal choices.
• Maximized Carat Weight - The pyramid-like shape of the princess cut allows cutters to retain more of the original rough diamond, yielding a higher carat weight compared to other cuts from the same rough stone.

In essence, the brilliant sparkle, chic modern silhouette, finger flattering shape and versatile styling options make the princess cut an attractive and popular diamond choice for engagement rings.

The main difference between a square princess cut diamond and a rectangular princess cut diamond is their shape proportions. A square princess cut has equal length and width, creating a balanced square shape. A rectangular princess cut is elongated, with a longer length than width, forming a rectangular shape.

The diamond shape you choose can affect the overall style of the engagement ring. A square princess cut has a symmetrical, classic look. A rectangular princess cut appears more elongated and contemporary in style.

Your choice also impacts how the diamond looks on the finger. A square diamond may appear larger than a rectangular diamond of the same carat weight due to its proportions. Ultimately, the shape you select depends on your personal style preferences.

The princess cut diamond is distinguished by its unique characteristics, setting it apart from other diamond shapes. Unlike round, cushion, or emerald cuts with curved or step-like facets, the princess cut features a square or rectangular shape, sharp corners, and brilliant faceting. This geometric design enhances its modern aesthetic and remarkable sparkle, distinguishing it from traditional diamond shapes.

Compared to round diamonds, princess cut diamonds often appear larger for the same carat weight due to their square shape, making them an ideal choice for those seeking a striking statement piece. Additionally, the princess cut's versatility allows it to be paired with various engagement ring settings, ranging from classic solitaires to intricate halo designs, offering endless options for customisation.

The 4Cs (cut, colour, clarity, and carat weight) are pivotal for assessing princess cut diamonds, impacting their allure, value, and quality significantly.

Primarily, the cut of a princess cut diamond is paramount, directly influencing its brilliance and sparkle. A meticulously cut princess diamond reflects light optimally, resulting in unparalleled brilliance and fire. Conversely, a poorly cut diamond may lack lustre, diminishing its overall appeal.

Colour is also pivotal, shaping the diamond's appearance and aesthetic charm. While princess shaped diamonds are often graded on a colour scale from D (colourless) to Z (light yellow or brown), the ideal hue largely hinges on individual preference. Nonetheless, diamonds with minimal colour tend to exude a brighter and more coveted allure.

Clarity denotes the presence of internal flaws (inclusions) or external blemishes on the diamond's surface. Higher clarity grades signify fewer imperfections, enhancing purity and brilliance. However, minor flaws are often imperceptible to the naked eye, rendering clarity less vital than cut and colour.

Lastly, carat weight determines the princess cut diamond's size and weight. While crucial, it's imperative to weigh it against the other 3Cs. A smaller diamond with exceptional cut, colour, and clarity may outshine a larger one with inferior attributes. 

One of the key advantages of princess cut diamond engagement rings lies in their versatility. Whether set in a classic solitaire, adorned with side stones in a halo design, or featured in a vintage-inspired setting, princess cut diamonds adapt effortlessly to various styles and preferences. This versatility empowers couples to customise their ring to perfectly reflect their individual tastes and personalities.

Moreover, princess cut diamonds offer excellent value for money. Their square or rectangular shape typically provides a larger face-up appearance compared to other shapes of the same carat weight. This means that customers can enjoy a visually larger diamond without compromising on quality or budget. Additionally, the it's ability to maximize sparkle ensures that each diamond appears radiant and eye-catching, making it a wise investment for couples seeking both beauty and value in their engagement ring.

When it comes to showcasing the beauty of a princess style diamond, several setting styles complement its angular shape and brilliance.

A classic solitaire setting is a timeless choice, allowing the princess cut diamond to take centre stage without distractions. Its simplicity emphasises the diamond's clean lines and sharp corners, creating a sophisticated and elegant look that never goes out of style.

For those seeking a touch of glamour, a pave setting is an excellent option. Tiny diamonds are set closely together along the band, adding sparkle and brilliance to the overall design. This setting enhances the princess cut diamond's brilliance, creating a dazzling display of light that captivates the eye.

Alternatively, a halo setting can elevate the princess cut diamond's appearance to new heights. A halo of smaller diamonds surrounds the centre stone, amplifying its sparkle and creating a striking focal point. This setting adds dimension and drama to the ring, making it perfect for those who want to make a bold statement.

Customising a princess cut diamond engagement ring allows you to create a truly unique and meaningful piece that reflects your personal style and love story. There are several customisation options available to tailor the ring to your preferences.

Firstly, consider the metal type for the ring band. Options such as platinum, white gold, and yellow gold offer different aesthetics, from classic elegance to modern sophistication. Each metal has its own unique properties and colour tones, allowing you to choose the one that best compliments your desired look.

In addition to selecting the metal type, you can customise the ring further by adding side stones or diamond accents. Side stones can enhance the overall sparkle and brilliance of the ring, while diamond accents add a touch of luxury and elegance.

Furthermore, consider incorporating unique design elements such as filigree or engraving to add personal touches to the ring. Filigree detailing adds intricate patterns and texture to the band, while engraving allows you to inscribe meaningful messages or dates onto the ring.

Working with a jeweller who specialises in custom designs is highly recommended. They can guide you through the customisation process, offer expert advice, and bring your vision to life. Together, you can create a custom princess cut diamond engagement ring that symbolises your love story and captures the essence of your relationship.