ABOUT GEMELLE
After over a decade serving UHNW clients at international luxury houses and advising family offices across Asia, Jessline Tan's relationship with gemstones evolved from professional expertise into genuine passion. For nearly two years, she quietly advised select clients who sought her counsel. It was they who encouraged her to formalise what had become an invaluable service, and everything fell into place organically.
GEMELLE was founded to serve discerning collectors differently. We source investment-grade gemstones directly from mines, cutting houses, and vetted dealers worldwide, applying maison-level evaluation standards to deeply personal service. Education rather than sales. Complete transparency without compromise on quality.
Jessline wanted the word "gem" at the heart of her company and decided on GEMELLE. On that same day, she received news that her cousin in Germany gave birth to twin daughters. She took it as a sign: all good things come in pairs. Gemelle, Italian for twins, symbolises double happiness (囍) and harmonious unions: exceptional stones meeting ideal settings, beauty aligning with lasting value, knowledge partnering with passion in perfect balance.
THE FOUNDER
Jessline Tan
Jessline's expertise in high jewellery and gemstones was forged over a decade serving UHNW clients at international luxury houses, where she worked directly with master craftsmen and gemmologists, managing exceptional stone acquisitions and bespoke commissions. It was the gemmologists who shaped her approach, teaching her to evaluate origin, assess rarity and provenance, and understand how cut and polish determine a gem's full potential. They revealed that exceptional jewellery begins long before the atelier: at the source.
She became captivated by the entire journey. Which dealers access the finest parcels. How to verify origin through geological signatures. Why certain stones command premium positioning. These experts taught her to see beyond surface beauty to the story and investment value within.
With GIA gemmological qualifications and an MBA in Business, Jessline founded GEMELLE after advising family offices across Asia on gemstone acquisitions and collection strategy. She brings this institutional-grade expertise to private collectors, where every acquisition is guided by the same rigour and discretion expected at the highest levels of wealth management.
HER LOVE FOR EMERALDS
Emeralds hold special significance for Jessline, not merely for their luminous depths, but for the complexity they demand. Each emerald's jardin tells a formation story, revealing where the stone was born and authenticating its journey from mine to hand.
Reading an emerald requires both technical mastery and aesthetic sensibility. Understanding which inclusions indicate authenticity, recognising how origin influences colour saturation, appreciating why certain stones possess that coveted inner glow. This philosophy extends across all acquisitions: every gemstone deserves proper understanding before it can be valued or acquired.
To Jessline, emeralds represent the essence of informed collecting. They reward those who invest time in understanding them, the standard she applies to every stone GEMELLE sources.
EDUCATING & ADVISING COLLECTORS
Jessline believes informed collectors make better decisions. She guides clients through every aspect of gemstone acquisition: reading gemmological reports from GIA, SSEF, and Gübelin; recognising quality indicators in rough and polished stones; understanding treatment disclosures; evaluating origin claims; and distinguishing investment-grade material from commercial offerings.
Beyond education, she manages the entire acquisition process: identifying which dealers access exceptional parcels, when to pursue auction versus private sale, how to verify provenance through documentation and laboratory analysis, and what questions to ask before committing significant investment.
This dual approach reflects GEMELLE's philosophy: the finest collections are built on understanding. When you know what makes a stone truly exceptional, you don't simply own it. You become its informed custodian, equipped to preserve and appreciate its value across generations.