Usually when we fabricate stone products, we need to cut slabs first. (except special shaped products and stone carvings)

And we all know slabs need large sizes blocks to fabricate. Therefore, we need book big sizes block from the quarries. Blocks selecting based on samples from customers or order demanded colors. It’s better to get some small pieces samples from the block, and then polish. Then compare with the colors, patterns, and grain with the samples we got from customers. 

Notice: we should choose consistence colors, same patter and grains.

Meanwhile, crack line, spot, colors various, patterns various etc defects cannot be accepted...

Remember one of the most important things:   

when we make packing, we need to put the similar color variation products in one crate, and make each "Mark" clearly. So it's easier and more convenient for our customers to install the products.