CYP Confirms Battery Grade Extraction from Lithium Clays Cypress Development Corp confirmed successful extraction of 99.94% lithium carbonate (Li2CO3) made from lithium-bearing claystone from the Company's 100%-owned Clayton Valley Lithium Project in Nevada, USA (Project). This deposit is shared by several companies in Clayton Valley and is the major step in proving viable lithium mining from Lithium Clay projects. Clayton Valley is the home of only producing lithium mine in North America. This is huge news. Deposit is shared by NRM, SPMT, TSLA and a few others.