2025-11-12 · 8 min read

The 4Cs for Jewellers: Spec Sheets That Survive the Bench

Close-up of a round brilliant diamond ring showing cut and fire

The 4Cs are not a classroom poster for trade teams — they are a contract. Vague “G-VS rounds” without millimetres causes returns.

Write size first for calibrated work, then colour and clarity bands, then cut/shape.

Cut is a shape decision for us

We do not stock twenty fancies. Choosing among five shapes is how cut quality stays controllable across a parcel.

Need a certified parcel?

Send shape, size and quantity on WhatsApp. We reply from Tsim Sha Tsui — a Hong Kong loose diamond trader for HK, China and Bangkok (BK) trade buyers.

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