Vermiculite is a layer-structured metamorphic rock of gibbsite silicate. Rich in magnesium. It comes from hot-liquid-eroded or weathered phlogopite. Xinyang Zhonzhou Industry co., Ltd. is the best quality vermiculite supplier. It loses water and expands when we get heat, lt turns curving as a leech. Therefore is called vermiculite. It can be divided into original vermiculite and expanded vermiculite. It can also be divided into golden vermiculite and silver-white vermiculite according to its color. Raw vermiculite: Siver vermiculite: 0.3-1mm 1-2mm 2-4mm 3-6mm 4-8mm. Golden vermiculite: 0-30um 0.2-0.6mm 0.3-0.6mm 0.65-1mm 0.3-1mm 0.5-1.5mm 0.5-1.2mm 1.5-3.5mm 1.5-2.5mm 1-2mm 2-4mm 3-6mm 3.5-7mm 4-8mm. Expanded vermiculite: Silver vermiculite: 0.3-1mm 1-3mm 2-4mm 3-6mm 4-8mm 20-400mesh. Golden vermiculite: 0-30um 0.3-0.6mm 0.65-1mm 0.3-1mm 1-3mm 2-4mm 3-5mm 4-8mm 20-400mesh. Accepted Delivery Terms: EXW, FOB, CFR, CIF, EXW Accepted Payment Currency: USD, EUR, AUD, CNY Accepted Payment Type: T/T, L/C, PayPal, Western Union