DIAMOND GUIDE
A simple way to navigate diamond decisions.
Diamonds are described using a handful of characteristics. Each one answers a different question — how it sparkles, how it looks, how large it appears, and how it's verified.
You don't need to memorise all of them. This guide breaks each category down on its own, with clear visuals and practical guidance, so you can move through confidently and focus on what matters to you.
Every diamond we offer already meets our quality standards. This guide helps you understand the differences, not confirm suitability.
The outline of the diamond when viewed from above.
Shape defines the overall look and personality of a ring. It influences how bold, classic, modern, or soft a diamond appears — but it does not affect the quality or sparkle on its own.
- Shape is about appearance, not quality
- Some shapes look larger than others at the same weight
- Elongated shapes create a longer, slimmer look
Start with the shape she's naturally drawn to. It will inform every other decision that follows.
How the diamond handles light.
Cut affects how bright and lively a diamond looks. It's what gives a diamond its sparkle, movement, and presence.
A well-cut diamond looks better at every size. A poorly cut one can look dull even if every other grade looks good on paper.
- Cut has the biggest impact on how a diamond looks
- It reflects brightness and sparkle through the diamond
- A well-cut stone will look beautiful immediately, even without knowing why
This is the area where higher quality is always worth it. We recommend Excellent cut as a baseline — you'll see and feel the difference immediately.
How white the diamond appears.
Color describes how much yellow tint a diamond has in everyday lighting. Most differences are subtle — especially once the diamond is set in a ring.
Higher grades look whiter on paper. In real life, many grades look the same.
- Color differences are hard to see once set
- Metal choice affects how color shows
- Most people can't tell the difference from D to I without side-by-side comparison
We only offer diamonds in the D–H range. You can see the full color range in a diamond selector, so everything you see will appear clean and bright.
How clean the diamond looks.
Clarity refers to natural markings formed as a diamond grows. Most of these are tiny and can't be seen without magnification.
The grade matters less than whether inclusions are visible to the naked eye — and at the sizes most people choose, they usually aren't.
- Most markings are invisible to the naked eye
- Many diamonds look identical despite different clarity ratings
- Eye-clean at VS2 or better is the practical benchmark
Highlighted grades represent our recommended range for best value.
We recommend VS2 or better. At this grade, inclusions are not visible to the naked eye — you won't see them, and neither will anyone else.
How much the diamond weighs.
Carat is a measure of weight, not a size. Two diamonds with the same carat weight can look noticeably different depending on shape and how they're cut.
Because of this, carat alone isn't a useful guide for size — it's not a guarantee of how large a diamond will appear.
- Carat measures weight, not width or height
- Shape affects how large a diamond looks
- Elongated cuts (oval, marquise, pear) appear larger at the same weight
Choose the ring that looks right for her, not the highest number. Carat is used after other factors are set — choosing an excellent cut stone that looks large for its weight will always serve you better.
How the dimensions of a diamond work together.
Proportions describe how a diamond is shaped in three dimensions — how wide it is, how deep it is, and how those parts work together.
A diamond can look great on a grading report but still appear flat or dark if the proportions are off. This is where cut quality becomes visible.
- Proportions affect sparkle and presence
- A diamond can be high quality on paper but still look unimpressive if poorly balanced
- This is one of the hardest things to judge without experience
If you'd like to review a diamond's proportions side-by-side, we can walk you through the options and tell you which proportions suit your size and budget best.
Independent confirmation of what you're buying.
A diamond certificate is an impartial report that verifies a diamond's key details. It confirms all the information you see — cut, color, clarity, and carat — and has been assessed by an independent laboratory.
- Certificates are assessed by independent gemological agencies
- GIA and IGI are the most widely used grading labs
- A certificate confirms the diamond's details match what's being sold
Every OLVR diamond is independently certified by GIA or IGI, and the report is available for review before you purchase.