The Holycome Journal

Buying Guides & Expert Advice

50 articles on stones, metals, sizing and care — the same answers we give our own clients.

Education · Mar 23, 2026

The two ways lab-grown diamonds are made, how they differ, and whether you should care which one you buy.

Education · Mar 16, 2026

How to read a lab-grown diamond certificate — which labs matter, what each grade line means, and how to verify…

Buying Guides · Mar 9, 2026

How to buy a lab-grown diamond engagement ring — budget allocation, shape choice, settings and the grades wort…

Education · Mar 2, 2026

Lab-grown diamonds save money and avoid mining — but they depreciate faster. Here's the balanced verdict for 2…

Buying Guides · Feb 23, 2026

How Colombian and Zambian emerald colour differ, what to look for in a lab-grown emerald, and which pieces sui…

Education · Feb 16, 2026

What makes paraiba colour unique, why natural paraiba is one of the most expensive gems, and how lab-grown com…

Education · Feb 9, 2026

Padparadscha is the rarest sapphire colour. Here's how it's defined, what it looks like in different lighting,…

Education · Feb 2, 2026

Ruby and sapphire are both corundum — here's how colour, treatment and clarity differ between them, and how to…

Education · Jan 26, 2026

Mohs hardness for every stone we sell, plus which ones are safe for daily-wear rings and which belong in penda…

Showing 28–36 of 50 articles

New arrivals & buying guides, once a month