Editor’s Note
This article announces the launch of “nos jewelry,” a new Japanese brand by Lucy Co., Ltd. specializing in lab-grown diamonds. The brand’s online store opened on November 15, 2025, with an introductory sale.
Lucy Co., Ltd. (Headquarters: Taito-ku, Tokyo, hereinafter Lucy) has launched “nos jewelry,” a domestic jewelry brand using lab-grown diamonds. Following test sales, the brand officially began sales via its online store (https://nosjewelry.com/) on November 15, 2025.
To commemorate the opening, a 20% off sale on all items is being held until November 30.
In recent years, the prices of precious metals like gold and platinum have continued to soar, driving jewelry prices ever higher. In response to voices expressing that jewelry is becoming less accessible, Lucy has leveraged the expertise cultivated through its jewelry OEM business for department stores and retailers to launch “nos jewelry” as a brand proposing a new jewelry scene using lab-grown diamonds.
Lab-grown diamonds (synthetic diamonds) possess chemical and physical properties identical to natural diamonds. To keep selling prices lower, nos jewelry offers grading reports (issued by IGI) as an optional service.
Lab-grown diamonds are visually indistinguishable from natural diamonds. The brand aims to propose a new way to enjoy diamond jewelry as “more user-friendly jewelry that easily adds sparkle to everyday life.”
(Note: For those who prefer natural diamonds, the brand can also accommodate such requests.)
The company, based in Okachimachi, Tokyo, has been engaged in jewelry OEM/ODM and wholesale business for manufacturers, retailers, and department stores. By utilizing its established manufacturing network and quality control expertise, Lucy drastically reduces intermediary margins. It delivers high-quality jewelry at fair prices made possible precisely because it is sold directly by the manufacturer.
In addition to free shipping on all items, the brand offers a robust repair warranty.
- 1-year repair warranty
- Ring size adjustment at purchase (up to ±2 sizes)
- Annual free cleaning service
The company has established a system to ensure customers can use their purchases with peace of mind even after buying.
- Online Store: https://nosjewelry.com/
- Period: November 15, 2024 (Friday) – November 30, 2024 (Saturday)
- Details: 20% OFF all items
- Note: No coupon code required; discount price is applied automatically.
- Instagram: https://www.instagram.com/nosjewelry/
