Japan’s largest lab-grown diamond e-commerce site with over 500,000 loose stones and designs to choose from

Over 500,000 loose stones and designs to choose from, Japan’s largest lab-grown diamond e-commerce site ​
Pure Diamond Co., Ltd. Press release: July 29, 2025 Choose from over 500,000 loose stones and designs, Japan’s largest lab-grown diamond e-commerce site We offer a next-generation custom jewelry experience that allows you to create your own ring.
https://prcdn.freetls.fastly.net/release_image/166675/2/166675-2-6c82a920cf4647ca24ebf7ee193e8331-3476×2456.jpg Pure Diamond Co., Ltd. (Headquarters: Minato-ku, Tokyo; Sales Headquarters: Taito-ku, Tokyo; CEO: Takuya Ito) has reopened Japan’s largest customized jewelry e-commerce site, where customers can freely combine over 500,000 lab-grown diamonds (LGD) loose stones with ring designs. We offer “practical luxury” that meets the needs of modern consumers by providing both price transparency and overwhelming choice. Custom jewelry with over 500,000 lab-grown diamonds, the largest selection in Japan. In addition to the traditional loose diamond sales, this renewal also includes a new custom jewelry function that allows you to freely combine and purchase ring designs. Diamonds that can be combined range in size from 0.5 carats to over 5 carats, and in terms of shape, you can choose from 10 types, including the popular round brilliant cut, oval, pear shape, heart, emerald cut, and princess. In addition to colorless diamonds, we also offer fancy colors such as pink and blue, so you can design your own unique piece from an overwhelming selection. Currently, there are six ring designs available, from classic solitaires to glamorous halos and delicate eternity rings. The materials available are platinum, K18 yellow gold, K18 white gold, and K18 rose gold, to suit all lifestyles and tastes. All jewelry is manufactured at affiliated factories in Japan, ensuring high reliability in terms of quality control and detailed finishing. We also provide after-sales support after purchase.
https://prcdn.freetls.fastly.net/release_image/166675/2/166675-2-720104532478308d5566742e774dd741-2142×1284.png Freely choose your ring design, base metal material, etc. Clear pricing and high customizability ensure both satisfaction and individuality The ring itself and the loose are each priced
separately, so you can clearly see how much is being spent on each item when you purchase. This eliminates the “opaque price” and “questions about validity” that often occur when purchasing jewelry in the past, and provides a satisfying shopping experience for modern consumers who are sensitive to the balance between quality and price. In addition, a ring using a 1-carat diamond can be purchased for a total price of less than 200,000 yen depending on the combination, achieving a high quality yet reasonable price range. This is not a pursuit of “cheapness,” but a redefinition of luxury through a rational supply structure and an online-only model. In addition, this service displays each diamond in a 360° image, allowing you to visually check not only the shape, but also the presence, location, and size of inclusions. Just as a professional appraiser examines each stone with a magnifying glass, users can check every detail and select the one they are satisfied with. This is a new purchasing experience unique to EC that is not available in physical stores, and is a strength unique to our company, which achieves both “trust” and “price” as a D2C brand.
https://prcdn.freetls.fastly.net/release_image/166675/2/166675-2-ce7dc21dcde1a22df4326a989e35a658-2052×1422.png Diamonds can be selected to perfectly match your desires using the filter function. From being chosen to choosing. A next-generation jewelry experience that meets individual values The value of jewelry is shifting from “ownership” to “empathy” and then to “meaning.” With this service, rather than choosing a finished product, the process of completing a ring while thinking about the combinations yourself is what is most attractive to users. Wearing something you choose yourself, not something chosen by someone else. The story and attachment you feel enhance the intrinsic value of jewelry. The potential of lab-grown diamonds in the Japanese market LGDs are sustainable diamonds created using the latest technology and have the same physical structure, brilliance, and hardness as natural diamonds. In Europe and the US, it is being adopted by high-end brands and is becoming established in the market as a new option. Although it is still in its infancy in Japan, the emergence of a service that combines scale, flexibility, and a wide range of prices will be a major catalyst for market growth. In addition, this online-only service can flexibly respond to regional restrictions and diversifying lifestyles. It is an extremely modern distribution model in that it provides an equally high-quality jewelry experience to people living in rural areas and those who have difficulty finding time to visit stores. A new value proposition called “practical luxury” Pure Diamond Co., Ltd. respects the individual aesthetic sense and values in jewelry and uses EC as an infrastructure to give shape to them. We aim to deliver a unique piece that is not mass-produced but is imbued with “feelings.” Lab-grown diamonds are not a substitute for natural diamonds, but a new way of making jewelry that allows you to “choose your own meaning.” Choose freely, put your feelings into it, and design a ring that is unique to you – that is the essence of this service. Pure Diamond EC site https://purediamond-shop.com About Pure Diamond Co., Ltd. Pure Diamond Co., Ltd. is the first company in Japan specializing in lab-grown diamond jewelry. We provide new value and options for jewelry, focusing on the import, wholesale, and retail of high-quality lab-grown diamonds. We also handle high-precision industrial diamond processing and diamond business consulting based on our extensive experience both domestically and internationally, and make optimal proposals that meet the diverse needs of each corporate and individual customer. Company Profile Company Name: Pure Diamond Co., Ltd. Head office location: Shirokane, Minato-ku, Tokyo Office location: Taito-ku, Tokyo Representative: Representative Director Takuya Ito Establishment : December 2016 Business Description: – Import, wholesale, and retail of lab-grown diamonds – Import, wholesale, and retail of lab-grown diamond jewelry ・Processing and wholesale of industrial diamonds ・Import and wholesale of natural diamonds ・Jewelry business consulting automatically, so please do not reply.