1 Carat Marquise Cut 18k Yellow Gold Lab Diamond Ring+ 1.0-Carat Marquise Lab Created Diamond

Lab diamonds typically cost 50 to 70 percent less than mined diamonds of comparable size, cut, color, and clarity. That price gap has widened as lab diamond production has scaled up. For most couples, this means getting a noticeably larger or higher-quality stone for the same budget.

The main reason is color: 18k has a noticeably richer, more vibrant golden tone. It also has a higher gold purity, which matters to some people from a quality or cultural standpoint. If the deeper color and premium gold content justify the higher cost and slightly reduced durability for your lifestyle, 18k is a beautiful choice.

A 1 carat lab diamond typically costs between $800 and $2,500 depending on cut, color, and clarity. At 1 carat, this was the average diamond size for many decades before lab-grown diamonds came along, making it a proven, timeless choice. A comparable mined diamond of the same quality can cost $4,000 to $8,000 or more. That gap has widened in recent years as lab diamond production has grown. Lab grown offers significantly more stone for the same budget.

Yes. Like pear cuts, marquise stones have pointed tips that are vulnerable to chipping. V-prongs or claw settings that fully cover both points are strongly recommended. Setting choice is especially important with marquise cuts, and a well-designed setting that protects both tips while showcasing the stone's outline is worth the attention. A 1 carat stone offers the timeless proportions that made it the default engagement ring size for most of the 20th century.

A 1ct marquise lab diamond in 18k yellow gold from Do Amore is chosen by couples who value both beauty and impact. The deeper, saturated hue of 18k yellow gold (75% pure) complements the marquise cut's dramatic elongated form, creating a striking visual statement. This lab-grown diamond is chemically identical to a mined stone with a perfect 10 Mohs hardness. Do Amore is the only engagement ring company featured on Shark Tank, and Forbes has recognized their ethical model.