WorkVenture gives you an inside look at what it's like to work at Gianna Jewellery Co., Ltd., office & team photos, reviews and more. This is the Gianna Jewellery Co., Ltd. Company Page. All content is posted anonymously by employees currently or previously working at Gianna Jewellery Co., Ltd..Apply to Toyota TsushoApply to sony technologyApply to SunriderApply to WV