Diamond
Hojudo also wholesales gemstones, so we always have over 300 diamonds in stock, including rare, high-quality diamonds such as IF (internally flawless) and FL (flawless) before they hit the market, diamonds with GIA certification, large diamonds over 1 carat, colored diamonds, and fancy cut diamonds such as marquise, cushion cut, and heart shape diamonds.
Diamond quality standard “4C”
The "4Cs" were established by the Gemological Institute of America (GIA) and are the international standards for evaluating the quality of cut diamonds for jewelry. Diamonds are evaluated based on four criteria: color, clarity, weight (carat), and polish (cut), and are abbreviated as "4Cs" from the initials of each. The 4Cs are listed on a diamond's "certificate."
Custom made is also possible
You can choose your own certified diamond and choose from the designs listed (products marked "Customizable/Remodelable Design"), or you can create an original design from scratch.









This is a K18 yellow gold diamond ring.
At the center, a high-quality 0.40 ct diamond with exceptional transparency and brilliance is set in a clean, colorless grade. The understated classic solitaire design minimizes decoration to showcase the diamond’s natural beauty and presence, adding an elegant sparkle to the hand. Timeless and unaffected by trends, this iconic style is ideal as an engagement ring, as well as a meaningful gift for anniversaries or a lifetime piece to treasure.
Detail
Stone:
・Diamond: 0.40 ct (E / VS2 / 3EX)
Material: K18 Yellow Gold
Size:
・Maximum ring width: approx. 5.4 mm
・Minimum ring width: approx. 1.5 mm
・Maximum thickness: approx. 4.6 mm
・Minimum thickness: approx. 1.4 mm
Weight: 2.8 g
Certificate: GIA Grading Report Included
Delivery Time: Approximately 1–7 days
Please note: Even if this item is marked as Sold Out, advance orders are available. For delivery time and pricing, please contact us directly.