April Birthstone: Diamond

What is the April birthstone?

The April birthstone is diamond. Most people picture the classic colourless stone, and that is the one the month is known for, but diamonds also form naturally in yellow, brown, and the rarer pink, blue and green (American Gem Society). If you were born in April, you have the most versatile birthstone of the whole year: it goes with any metal, suits any style, and works as a modest everyday sparkle or a serious centre stone. That flexibility is a genuine gift when it comes to choosing a piece.

Hardness and daily wear

Diamond sits at 10 on the Mohs hardness scale, the very top, which makes it the hardest natural material we know of (International Gem Society). Nothing in ordinary life will scratch it, which is exactly why it became the default stone for engagement rings people wear every day for decades. That said, hardest is not the same as indestructible, and this is the one thing I always make sure customers understand. Hardness measures scratch resistance, not toughness. A diamond has cleavage planes, and a sharp blow on the wrong edge can chip it. So even with the toughest stone on earth, a sensible setting that shields the girdle and corners still earns its keep. For everyday rings that is worth thinking about. You can read more on our gemstone guide about how the different stones compare on durability.

Meaning and history

Diamond has long been associated with strength, endurance and lasting love, which is really a story built on its hardness. A stone nothing can scratch is an easy symbol for a bond meant to last, and that link is a big part of why the diamond engagement ring became such a fixed tradition. The word diamond itself comes from an old Greek term meaning unbreakable. Historically diamonds were rare and reserved for royalty; the modern idea of a diamond for every engagement is much more recent than most people assume, shaped heavily by twentieth-century marketing. None of that takes away from the stone, but I think it is honest to say the meaning has been built up over time rather than handed down from antiquity.

Cut, shape and choosing an April piece

Here is the part that matters most and gets the least attention: a diamond's beauty is driven more by its cut than by its carat weight. Cut is how well the stone has been shaped and polished to bounce light back at you. A smaller, well-cut diamond will look livelier and brighter than a larger stone that has been cut badly to save weight, so I would always rather see someone spend on cut than chase size. Shape is the next decision, and April babies are spoiled here: round brilliant for maximum sparkle, oval or marquise to look larger for the weight, emerald cut for clean quiet lines, cushion for a softer vintage feel. Our diamond shapes guide walks through each one. For gifting, a diamond pendant or a pair of studs is the easiest thing in the world to get right because it suits everyone and takes almost no wear. For a ring worn daily, choose the setting with care as noted above. Because we design and set every piece in-house here in Coquitlam, we can build around a stone you choose, match it to white, yellow or rose gold, and get the setting right for how it will actually be worn. If the April birthday also marks a 10th wedding anniversary, diamond is the traditional stone for that milestone, so one piece can honour both (10-year anniversary pieces). That overlap is a common starting point for our bespoke anniversary work. And to see how diamond sits against the rest of the calendar, our birthstones guide covers every month.

Frequently asked questions