The Goharbin Journal
Buying guides, understanding stones, and caring for your pieces — written by the Goharbin team.
Why does white gold turn yellow?
On rhodium plating, how often it is needed, and what you can do at home each month.
Sapphire: why royal blue is the most expensive blue in the world
From the mines of Ceylon to Kashmir — and how to tell whether a sapphire has been heated.
The four Cs of diamond, in plain language
Cut, colour, clarity and carat. Which of them actually changes the brilliance your eye sees?
Making fee, margin and VAT: how to read a gold invoice
We open up a real invoice line by line, so you know what you are paying for — and where you should be asking questions.