OSTBY & BARTON Late Victorian 14kt Ceylon Sapphire + Diamond Cluster Ring
Ostby & Barton Jewelry Co. was founded in 1879, a partnership between Nathan B. Barton and Engelhart Cornelius Ostby. Despite humble beginnings, the company eventually thrived, becoming one of the world's largest ring manufacturers.
Ostby received his training at the Royal School of Art in Norway to become a jeweler, later apprenticing in Oslo before emigrating to the United States. Tragically, during one of his routine trips to Europe with his daughter to further his jewelry knowledge, he perished on the voyage of the infamous Titanic in 1912, at the age of 64. Despite this devastating loss for his 22-year-old daughter Helene, who survived the voyage, Ostby & Barton continued to thrive after his untimely death. Helene devoted herself entirely to the family business based in Rhode Island, which produced a variety of fine jewelry goods up through the 1950s. Even in the modern day, Ostby & Barton remains a desirable name among collectors and lovers of vintage jewelry!
This gemstone diamond engagement ring from the late Victorian (ca1900) era is a signed piece by Ostby & Barton! Crafted in 14kt yellow gold, the piece adorns a stunning blue Ceylon sapphire at the center of a sparkling diamond border. The beautiful prong set stone weighs approximately 0.60ct, exhibiting a vivid cornflower blue color and no indications of heat treatment. A border of old Mine Cut diamonds surround the center stone, collectively weighing approximately 0.35ctw and forming an incredible sparkling array. The prongs surrounding the diamonds create a lovely scalloped pattern visible from the sides, and completing the design is a smoothly polished band that graduates slightly towards the back. Stamped inside of the shank is a "14K" gold purity mark besides the signature Ostby & Barton "OB" maker's mark. A magnificent ring, it would look lovely worn to make a special occasion, or could make an exquisite gemstone engagement piece!
Measurements: The ring has a finger size scant 6.75, but could easily be resized. The sapphire and diamond centerpiece measures about 3/8" in diameter, and rests just over 1/8" above the finger when worn. The graduated band measures approximately 1.5mm wide at the back.
Condition: The overall condition of the ring is excellent. Besides normal surface wear, there is no apparent damage to the gold setting. The sapphire and diamonds are all intact and securely set.