WorkVenture gives you an inside look at what it's like to work at Dia Jewel Co., Ltd., office & team photos, reviews and more. This is the Dia Jewel Co., Ltd. Company Page. All content is posted anonymously by employees currently or previously working at Dia Jewel Co., Ltd..Apply to 2C2PApply to TriumphApply to SO IDEAApply to M Concrete