絶妙な1.50 ctラウンドカットラボで栽培されたダイヤモンド| IGI認定VVS1 Clarity、D Color

A round cut lab grown diamond is a perfectly circular diamond with a precise facet pattern designed to maximise light return and brilliance. It is created in a controlled laboratory using advanced technology, then cut and polished to the same standards as a mined round brilliant diamond.

Yes. Round cut lab grown diamonds are 100% real diamonds. They have the same chemical composition, hardness, and optical performance as mined diamonds and are made of pure crystalline carbon. They are graded by the same international laboratories using the same criteria and scales.

The round brilliant cut is engineered to optimise light performance, giving exceptional brightness and fire when well cut. It is versatile, timeless, and works beautifully in almost any style, which is why many people choose round cut lab grown diamonds for engagement rings, stud earrings, and classic fine jewellery.

For round cut lab grown diamonds, cut quality is the most important factor because it directly affects brilliance and light return. After cut, consider colour, clarity, and carat weight according to your priorities and budget, aiming for a balanced combination that looks bright and refined in natural light.

Yes. Even with the same carat weight, a better cut grade can make a round cut lab grown diamond appear more lively and visually impressive. Well-aligned facets, ideal proportions, and symmetry allow more light to reflect internally and return through the top of the stone.

To the eye, a round cut lab grown diamond and a round cut mined diamond with similar specifications will look the same in terms of brightness, fire, and overall appearance. Gemological instruments and report inscriptions, not appearance alone, are used to identify whether a diamond is lab grown or mined.

Yes. Round cut lab grown diamonds are graded and certified by trusted laboratories such as IGI and GIA. Each certified stone comes with a detailed grading report outlining its cut, colour, clarity, carat weight, proportions, and growth method.

For round cut lab grown diamonds, the ideal length-to-width ratio is very close to 1.00, indicating a true circle. Small deviations are normal, but a ratio near 1.00 helps the diamond look balanced and symmetrical when viewed from the top.

Yes. Lab grown diamonds, including round cut stones, rank 10 on the Mohs hardness scale, exactly like mined diamonds. This makes them highly durable and suitable for everyday wear in pieces such as engagement rings, bands, and daily jewellery that is worn often.

In many cases, round cut lab grown diamonds allow you to choose a larger size or higher quality within the same budget compared to a comparable mined diamond. This value, combined with transparent sourcing and controlled origin, is why many modern buyers prefer lab grown options.