For many people, jewelry marks life’s biggest milestones. An engagement ring celebrates the beginning of a new chapter. A pendant passed down through generations carries cherished family memories. A redesigned heirloom gives new life to a treasured piece while preserving its story. At East Coast Jewelry Co. in Newtown Square, owner Jonathan Moncavage understands that every piece is far more than gold and gemstones. It represents a moment, a memory and often an emotional connection that deserves exceptional craftsmanship.
Located on West Chester Pike, East Coast Jewelry Co. has built its reputation by combining old-world craftsmanship with modern technology. While many jewelry stores send custom work and repairs to outside vendors, every step of the process at East Coast Jewelry Co. happens under one roof. From the initial consultation and computer-aided design to casting, stone setting, laser welding, engraving, polishing and final inspection, each piece is completed in the company’s Newtown Square studio. That commitment allows Jon and his team to maintain complete control over quality while giving customers confidence that their most treasured possessions never leave their care.
Jon’s passion for jewelry was built on a foundation of craftsmanship and technical expertise. As a graduate gemologist and experienced custom jewelry designer, he has dedicated his career to mastering every aspect of the jewelry-making process. “Rather than simply selling finished pieces from display cases, I really enjoy collaborating with clients to create something completely personal,” Jon said. “I believe the best designs begin with a conversation, whether a customer arrives with detailed sketches or simply an idea they hope to bring to life.”
That collaborative philosophy has become one of the company’s defining characteristics. Customers are encouraged to bring photographs, inspiration, family heirlooms or even rough sketches. “We have a team of experts who can transform those ideas into professional 3D computer renderings so clients can see exactly what their finished jewelry will look like before production begins,” explained Jon. The process goes one step further with a wearable 3D-printed model, allowing customers to try on the design, evaluate its proportions and request adjustments before any precious metal is cast. “Only after the customer is completely satisfied does production begin.”
While custom engagement rings remain one of East Coast Jewelry Co.’s specialties, the business offers far more than bridal jewelry. Custom pendants, earrings, bracelets, wedding bands and one-of-a-kind statement pieces are designed and handcrafted in the studio. Heirloom remounting has also become increasingly popular as families look for meaningful ways to preserve the sentimental value of inherited jewelry while creating pieces that better reflect today’s styles. Rather than leaving treasured stones tucked away in a drawer, Jon and his team help families transform them into beautiful new designs that can be worn and enjoyed for generations to come.
East Coast Jewelry Co. is equally well known for its repair services. From ring sizing and prong rebuilding to stone replacement and intricate restoration work, repairs are completed on site by experienced jewelers using advanced equipment, including laser welding technology that allows for remarkable precision while protecting delicate gemstones and vintage settings. Customers appreciate knowing their jewelry remains in the hands of the same trusted professionals from start to finish.
The business also provides professional jewelry appraisals performed by a qualified gemologist, along with diamond and colored gemstone sourcing for customers searching for the perfect center stone. Whether someone is looking for a natural diamond, a lab-grown diamond or a rare colored gemstone, Jon leverages years of industry relationships to help clients find exceptional quality while educating them throughout the selection process.
Another service that distinguishes East Coast Jewelry Co. is its estate jewelry purchasing program. Families often inherit jewelry they no longer wear or understand the value of. Instead of dealing with pawn shops or mail-in buyers, customers receive honest, transparent evaluations from experienced professionals who explain exactly what they have and how its value is determined. The company purchases estate jewelry, diamonds, colored gemstones, gold, platinum and silver, offering fair market value without pressure or obligation.
Although the company embraces cutting-edge technology, its roots stretch back half a century. Originally established as Eastern Lapidary in 1975, the family-owned business has served generations of customers throughout Delaware County, Chester County and the Main Line. Today, under the East Coast Jewelry Co. name, Jon continues that tradition while investing in modern equipment and innovative techniques that elevate both the customer experience and the finished product. Every custom piece is stamped with the ECJco mark as a symbol of craftsmanship completed
entirely in the Newtown Square studio.
Perhaps the greatest testament to East Coast Jewelry Co.’s success is the loyalty of its customers. “Much of the business comes through referrals from clients who return for anniversaries, engagements, birthdays and other milestone celebrations, often bringing children and grandchildren to begin traditions of their own,” Jon explained. “That level of trust is earned through honesty, attention to detail and a genuine commitment to creating jewelry that reflects each customer’s story.”
For Jon and his team, jewelry has never been about simply making a sale. It is about listening carefully, building relationships and creating pieces that become part of a family’s history. Whether designing an engagement ring from scratch, restoring a treasured heirloom or helping someone discover the hidden value of an inherited collection, they approach every project with the same philosophy that has guided East Coast Jewelry Co. for decades: exceptional craftsmanship, complete transparency and personal service delivered close to home. In an age when so much is mass-produced and outsourced, East Coast Jewelry Co. continues to prove that the finest jewelry is still made the way it should be, one conversation and one handcrafted piece at a time.
East Coast Jewelry Co. is located at 5048 West Chester Pike, Newtown Square. For more information, visit their showroom, give them a call at 484-619-7998 or check out their website at ECJewelry.co.