The selection of tombstone blocks should consider the color, variety, crystal particles, presence or absence of cracks, defects, and physical and chemical properties of the stone.
The stone used for tombstonesis mainly granite. Different countries and even different regions of the same country have different preferences for the types and colors of stone used for tombstones. For example, the tombstones in the Kanto region of Japan are mostly grayish black and green. Granite is the mainstay, and the Polish region is mostly black.
The black series granite used as the material of the tombstone is the main material of the European tombstone. The color of the stone used for the tombstone is very important. Usually the tombstone is sold in sets. Therefore, the color of the tombstone is required to be even. The size of the crystal particles should be the same. It is best to cut the blanks of various matching stone products that meet the same set of tombstones on the same block. If you can't choose on the same block, you should also try to use the same color block processing in the same mine.
The quality of the block itself has a great influence on the yield. The selected tombstones should have no cracks, no scars and no color lines. The water absorption rate is low, the physical and chemical properties are stable, and the crystals are uniform.