Sirius Mineral Plc is a United Kingdom-based resource development company. The Company is focused on the development of a polyhalite deposit located in North Yorkshire, the United Kingdom. The Company's focus is on developing a multi-nutrient product, POLY4, to be used as a direct-application fertilizer and as a component in nitrogen, phosphorus and potassium (NPK) blending. It has developed a granulation process, which enables polyhalite to be processed without the use of chemicals, into a form beneficial for plant nutrient uptake. The Woodsmith mine is located near Whitby, North Yorkshire. Polyhalite is an evaporite mineral comprising a natural combination of four of the six macro-nutrients that are essential to plant growth, potassium, sulfur, magnesium and calcium.The Company's POLY4 product is available in granulated, powdered or chipped form to meet the needs of its customers, taking into account their crop needs, blending requirements, application method and soil conditions.