Stone We are processors / exporters of the best quality sandstones, limestone, slates, cobbles, pebbles, tumbled stones, landscaping stones, fireplaces, fountains, balusters, vases, mosaics, marble, stone articles, granite and many other natural stones in customised sizes, colours and shapes. The material is packed in wooden boxes/pallets generally made up of eucalyptus / mango wood each taking about 30-35 sq.M. Of material of 7-15 mm thickness. A 20 ft long container takes about 20 boxes of size 38" x 38" x 25". The quantity shipped per container depends on (1) the allowed weight at the destination port and (2) upon the thickness of the stone. Generally (with a variation of +/- 10%) the quantity of material that can be shipped in a 20 ft container would be the following (28 tons): (for 20 tons a prorata reduction is advised)