Conglomerate is a sedimentary rock formed from rounded gravel and boulder sized clasts cemented together in a matrix. The rounding of the clasts indicates that they have been transported some distance from their original source (e.g. by a river or glacier), or that they have resided in a high energy environment for some time (e.g. on a beach subject to wave action). The cement that binds the clasts is generally one of either calcite, silica or iron oxide. The matrix can consist solely of the cementing material, but may also contain sand and / or silt sized clasts cemented together among the coarser clasts.
I ship in flat rate priority boxes that comes with $50.00 insurance and tracking. small flat is $5.95 and can fit up to 4 rocks or slabs. Medium $12.95 that can fit at least 12 rocks or slabs. Or upgrade a large which will fit... well alot of rocks or slabs. non U.S. pays actual shipping, send me country and postal code.