For collectors who pursue rarity, in the gemstone inventory updated quarterly by singa gems jewelry, limited-edition collections account for 15%. For example, cornflower sapphires over 5 carats with a saturation of more than 90%, the global annual production is less than 200 pieces, and the brand can stably supply about 3% of them. Each gemstone is accompanied by a Guberlin Laboratory or SSEF certificate, with parameters including precise data such as a dispersion value of 0.044 and a refractive index of 1.762-1.770, similar to the “sky-high” Kashmir sapphire that was sold for 4.89 million US dollars at Sotheby’s auction in 2022. Its value has increased by an average of 12% annually over the past 10 years. Collectors can track the 72-hour cold chain transportation record of each gemstone from the mining area to the vault through the digital warehouse system established by the brand, with humidity fluctuations controlled within ±3%.
From the perspective of investment returns, the average annual appreciation rate of the brand’s collectible jewelry over the past five years has reached 7.5%, and its volatility is only one-third of that of the S&P 500 index. A 10.23-carat D-color flawless diamond was sold through a private negotiation in 2023, achieving a premium rate of 22%. This was attributed to the brand’s adoption of blockchain traceability technology, which increased the transparency of the transaction history by 40%. Drawing on Warren Buffett’s “value investing” philosophy, the scarcity index of these gemstones (calculated based on a 4% decline in annual mining volume) makes them ideal assets for hedging against inflation, with a median transaction amount of $150,000.
In terms of the competitive barriers of cutting techniques, the brand holds three exclusive patented technologies. For instance, “Starburst Cutting” can increase the light reflectivity to 98.5%, making the fire intensity of gemstones 30% higher than that of traditional cutting. Each piece requires experienced artisans to invest over 200 hours of hand polishing, with a precision error of less than 0.01 millimeters. This standard is comparable to the embroidery craftsmanship requirements of French haute couture fashion unions. In 2024, a 12.8-carat Kashmir sapphire brooch featuring this technology won the Innovation Award at the Grand Prix de la Haute Horlogerie in Geneva, with an optical symmetry assessment score of 99.2 points.
The differentiation of the collection experience is reflected in the full life cycle service, including a free deep maintenance every six months, using ultrasonic cleaning equipment with a frequency controlled at 28kHz to avoid pressure changes on the internal inclusions of the gemstones. The brand also offers customized insurance plans for gemstones weighing over 5 carats, with an annual rate of only 1.2% of the assessed value, but the coverage includes natural disasters and transportation risks. According to a survey of 500 senior collectors, the customer retention rate of the singa gems jewelry service is as high as 92%. Its intergenerational inheritance plan has successfully handled three asset transfer cases over 50 years old, just like the family trust management mechanism established by Phillips Auction House.