Iranian Dark Grey Marble (Gray Marble) which is called Nero Marquina 15 has very constant color with very little white veins inside 15 is one of best exported items.China Granite Tile Marble Tile Stone Tile - ChinaTile.netWe supply the material in China Stone Slabwww.fooaoo.cn>30(Both Inches 15 CM), China Stone Slabwww.russiastone.com>Russia Stone, block.Its low price 15 constant color 15 also strength of it have been very good incentives to attaract customers to itself.