The guide
Guides
Plain answers to the questions we are asked every day, written by our gemologists in New York.
Featured · Care
Caring for Your Jewelry
How to clean, store and wear your jewelry so it looks as it did the day it arrived.
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Buying guide · Sep 1, 2026
Screw Back vs Push Back vs Guardian Back: Which Earring Back Is Best?
Screw back, push back or guardian back: which is most secure, which suits long nails, which you can sleep in, an...
Buying guide · Sep 1, 2026
Diamond Stud Size Guide: What 1, 2 and 3 Carats Really Look Like
Carat weight on studs is quoted for the pair, not each ear. A size-by-size table in millimetres, what each reads...
Buying guide · Sep 1, 2026
How to Find Her Ring Size Without Asking
Four methods that work, ranked by accuracy, plus what to do if you get it wrong. Every ring we make includes one...
Buying guide · Sep 1, 2026
Oval vs Round: Which Diamond Shape Looks Bigger?
Two stones of identical carat weight can look very different on the hand. Here is how shape affects apparent siz...
Budget · Sep 1, 2026
How Much Should You Spend on an Engagement Ring in 2026?
The three-months-salary rule was an advertising slogan, not advice. Here is what people actually spend, what dri...
4Cs · Mar 3, 2025
The 4Cs of Diamonds, Explained Simply (and Where to Spend)
Cut matters most, clarity matters least, and carat moves the price. A plain-English guide to the 4Cs, with what ...
sustainability · Mar 3, 2025
Why We Chose Lab-Grown
Why Ring Premier works only in lab-grown diamonds, and what that lets us offer.