Designed for Legacy
Our Story
The Beginning
Our legacy was forged by Hien Nguyen, who arrived in America from Vietnam during a time of upheaval, carrying the responsibility of a family of five and the quiet resolve to build a future. In the workshop of a master jeweler, he found both refuge and purpose — spending his days restoring worn heirlooms and his nights teaching himself to create his own designs. Those early pieces, once displayed modestly in a studio window, marked the beginning of something larger. When his mentor retired, he passed more than a business — he entrusted Hien with a livelihood, a craft, and a chance. From perseverance and practiced hands, the Gold & Diamond Center was born.
Learning The Trade
With time, trust, and evening English courses, Hien opened The Gold & Diamond Center in the heart of St. Petersburg, Florida. The store became known for craftsmanship, honesty, and word-of-mouth reputation. In the back, his wife ran a thriving alterations business — the space alive with work and family. Their son, Coy grew up inside the store, learning the trade after school and on weekends. Jewelry repair, buying and selling, and luxury watches became second nature. The business grew quietly, steadily, and with intention.
A Modern Era
Under Coy’s stewardship, the store entered a new chapter shaped by experience and forward momentum. The watch business expanded with intention, establishing a strong footprint in pre-owned luxury — particularly Rolex — alongside expert watch repair and restoration. At the same time, custom jewelry design evolved, integrating new technology while remaining rooted in traditional craftsmanship. During a period of global uncertainty, the store was renovated and reimagined, marking not just a physical transformation, but a shift into a more modern era of the business. The space became lighter, more refined, and better equipped for what was ahead. It was during this time that another generation stepped into the store, contributing fresh perspective while learning from what came before. The foundation held, even as the vision widened.
Building The Legacy Together
Today, three generations shape the Gold & Diamond Center, grounded in family, integrity, and hard work. What began with Hien continues with Coy and Vivian — and remains a shared family endeavor. Together, we remain committed to serving St. Pete and beyond with thoughtful service, exceptional jewelry, watches, and the care of a trusted family jeweler — something increasingly rare today.
Make An Appointment
Schedule a time to visit us in our St. Pete showroom.