Blue Diamond 2.15ct – SOLD

$470.58 ~~$1043~~ In stock

Blue Diamond round 2.15ct (7.8mm)

Ever seen images of the Caspian Sea from space? Me neither up until trying to find the perfect description for this multicoloured spectacle. This one of a kind diamond has an array of deep green tones through to teal inclusions. A natural masterpiece.

Recommended design: 9ct Yellow, Rose or White Gold Morrîgan

Videos available on request, we cannot promise appropriate background music, but if you’d still like one anyway please email: [email protected]

Fallen for this 2.15ct Blue Diamond but have got another design in mind? Send us your best sketch and we’ll see if we can decipher it.

Lead times vary dependant on the complexity of the design, usually around 8-12weeks.

If you’re a worrywart and want to secure this diamond before discussing your bespoke design, you can choose to pay a deposit now. We’ll follow up your order with an email to discuss your bespoke design (prices from £1400)

If you get your hands on one of our available gemstones, use the hashtag #BmmBespoke to get a congratulations from us.

Customer Reviews (5.0 / 5 · 5 reviews)

Aurora ★★★★★ Sep 7, 2026

I was a little nervous buying a colored diamond sight unseen, but the 7.8mm round cut catches light in a way that makes the whole stone shift between blue and green tones. It’s genuinely like holding a piece of the sea, and the 2.15ct size has real presence without feeling bulky on the finger. So gl

Joshua F. ★★★★★ Sep 6, 2026

The photos don’t do it justice—every angle shows a different shade of blue, like the sea itself. My jeweler confirmed the round cut is flawless at 7.8mm, and it sits beautifully in the setting I picked out. I’ve stared at it more than I’d like to admit since it arrived.

Joseph F. ★★★★★ Sep 3, 2026

The blue is deeper than the photos suggested, and at 2.15ct it sits with real presence without looking gaudy. I keep catching it in different light and noticing a new shade each time.