A diamond’s certification describes its unique characteristics and establishes its authenticity, providing complete peace of mind. Many of the diamonds Prestons showcases are independently certified by the Gemological Institute of America (GIA). The GIA is internationally renowned as a reputable and reliable organisation. Each certified diamond will be accompanied by physical or digital papers detailing its features, confirming its authenticity and quality.
While a diamond’s colour, cut, clarity and carat help to determine its value, there is no substitute for human expertise in deciding the quality of a stone’s unique personality. In selecting our diamonds and gemstones, our buyer only chooses those whose beauty exceeds their on-paper certification. Our showroom teams will always have an open and honest conversation with any client about their specific requirements and preferences, in order to find the perfect stone for them.