WorkVenture gives you an inside look at what it's like to work at SIAMSTONE AGGREGATE CO., LTD., office & team photos, reviews and more. This is the SIAMSTONE AGGREGATE CO., LTD. Company Page. All content is posted anonymously by employees currently or previously working at SIAMSTONE AGGREGATE CO., LTD..Apply to ProntoApply to Evergreen ChemicalApply to TNTApply to WorkVenture Technologies