Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to buy pearls [title] Choose a growth style. [step] Cultured pearls grow through a process in which a small piece of sediment-a grain of sand or a bit of shell-is deposited inside of an oyster. The oyster then coats the deposit with a glossy secretion called nacre.

Ending1: There are no significant changes in carat size. A new pearl will usually be larger than oyster size, but there are some exceptions to the guidelines. Ending2: Oyster building habits are laid out differently for choosing a growth style that involves holding the oyster in place. It comes down to respect, drug usage, and its overall cost, and fully understand what the market will be like for the size and shape of the oyster shell. Ending3: This coating smooths out the solids and minerals, which gives the pearls a matte glossy look. Other innovative options include oysters used for recipes, smoked oysters, and kosher food. Ending4: Over time, the nacre builds layers to form a pearl. Originally, pearls could be found in abundance in oysters throughout the oceans, but now they can be grown in laboratories.

Answer format: ending1/ending2/ending3/ending4