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Our own plant, not a trading desk.
HOLYDIAM is the direct-to-client brand of Wuzhou Henglilai Jewelry Co., Ltd.. We design, model, cast, set, polish and inspect in one 8,000 m² plant in Wuzhou — the same floor that produces for brands in more than a hundred countries.
From a shop counter to a factory floor
We began in 2008 as a jewelry shop in Panyu, Guangzhou — retail first, then wholesale, then casting and setting for other brands. In 2020 the whole bench moved to our own plant in Wuzhou, the centre of China's moissanite and lab-grown diamond trade.
That history is why we can quote a factory price: there is no importer, distributor or boutique between the drawing and the box.
“The quote you receive is the cost of making plus our margin. Nothing else is added along the way.”
One roof, five stations
Nothing is outsourced, so lead times and quality are ours to control.
CAD & modelling
In-house designers model every commission and revise it with you before casting.
Casting
925 silver, 10K/14K/18K gold and platinum, cast in small batches.
Setting
Prong, bezel, pavé and channel work, laid stone by stone under the loupe.
Polish & QC
Polished, plated and inspected against the approved drawing before packing.
Certificates & workshop evidence
GRA for moissanite, IGI for lab-grown diamonds — report number matched to your stone.
Workshop tour · Wuzhou plant
Every certificate is photographed with the finished piece before packing, so the report you receive matches the stone you receive.
Timeline
Eighteen years, one direction.
Panyu jewelry shop opens; first bench in the back room.
Moissanite line added as the stones reach the Guangzhou trade.
Own 8,000 m² plant in Wuzhou goes into production.
Direct commissions to 100+ countries, still bench-made.
Want to see it at the bench?
If you are travelling through Guangxi, tell us the dates — a plant visit is usually possible with a week's notice. Otherwise we walk the workshop on a video call.