iconserca group, with full corporate responsibility and authority, we publish here our full corporate offer (fco) for the sale of rare earth in the terms and conditions set forth below: material: black sand tantalum and niobium origin: Guyana source: Guyana quality: product quality Guyana 30% min destination: fob cartagena or buena ventura (no conflict blood) quality: 30% minimun 33% > ta (anex a mine location) quantity: 20 mt price: 95 $ x kg = 95, 000 mt or 115 usd x kg 115.000 mt with air freight fluctuation: +- 5% packaging: bags or recipient 50 kg.