Blue Lab Grown Diamond Engagement Rings

What Makes a Lab Grown Diamond Blue

A blue diamond owes its colour to boron, a trace element that sits inside the carbon crystal and absorbs the red end of the spectrum. Natural blue diamonds are among the rarest gems in the world, and the famous Hope diamond is blue for exactly this reason. In the lab, boron is added during growth, so the blue is part of the crystal itself and cannot wear off or fade. The result is a real diamond, 10 on the Mohs scale, in a colour that was once out of reach for almost everyone.

Our blue centre stones are graded Fancy Intense, a clear, saturated blue that still throws white sparkle from the facets, with VVS1 to VVS2 clarity. The IGI report with each ring records the colour grade and the growth method.

Blue Diamond or Blue Sapphire?

A sapphire is corundum, 9 on the Mohs scale, with a softer, more velvety glow. A blue diamond is harder, brighter and flashes more light from its facets, so it reads as a sparkling blue rather than a deep, still blue. If you love the colour of a sapphire but want the diamond look, a fancy intense blue lab grown diamond gives you both.

Shapes and Settings in This Collection

Oval is the most common shape across the sixty designs, followed by round, emerald, princess, pear, radiant, marquise, hexagon and cushion. Settings range from plain solitaires and pavé bands to three stone, hidden halo, twisted, split shank, cathedral and vintage designs, most with small white lab grown diamond accents. Elongated shapes such as oval, pear and marquise show more colour across the finger, while cushion and radiant cuts hold colour in their depth, so they look slightly more saturated than a round brilliant of the same grade.

Which Metal for a Blue Diamond

White gold and platinum keep the blue cool and crisp, the classic pairing. Yellow gold makes the stone look deeper and more saturated through contrast, a warmer, vintage look. Rose gold is the boldest choice and suits the pavé and vintage designs best. Every ring is offered in 925 sterling silver, 10K, 14K or 18K gold in yellow, white or rose, or platinum; yellow and rose on silver and platinum are plated finishes.

Prices

A 1 carat centre starts at $647.49 in 925 sterling silver, $1,147.49 in 10K gold, $1,347.49 in 14K gold, $1,547.49 in 18K gold and $1,477.49 in platinum. Each extra carat adds $675 whichever metal you choose, and all four colours are priced the same, so the price depends only on the carat weight and the metal. Every product page shows the current price for each option, and our lab grown diamond price guide compares colourless and coloured stones side by side.

Made to Order, with an IGI Report

Every ring is made to order at our studio in Bhavnagar, Gujarat. We set the centre stone, cast and finish the setting by hand in your size and metal, and the ring is ready in about 8 to 10 business days, then shipped free, insured and tracked. It comes with a Bhumi Gems certificate of authenticity recording the stone, carat and metal, and the centre diamond comes with its own IGI grading report, which also records the growth method and any treatment used to produce the colour.

More Colours

The same sixty designs are also made with a pink, yellow or green lab grown diamond centre, with a colourless centre in our lab grown diamond engagement rings, and in blue moissanite in our coloured moissanite rings. All four colours are gathered in coloured lab grown diamond engagement rings.

Helpful Guides

• Colored lab grown diamonds: how blue, pink, yellow and green are made
• Lab grown diamonds guide
• Lab grown diamond ring prices by carat
• IGI vs GIA reports for lab grown diamonds
• CVD vs HPHT lab grown diamonds
• Colored moissanite guide