Certain people are also more prone to anemia due to the following conditions: 1  Insufficient iron in the diets. 2  Children who experience sudden growth spurts. 3  Women who have been pregnant for four months or more. 4  Women who have given birth recently. 5  People who suffer from chronic kidney disease.
Seed crystal. A seed crystal is a small piece of single crystal / polycrystal material from which a large crystal of the same material typically is to be grown.
Typically, the seed is pulled from the melt at a rate of 1 to 100 millimeters per hour. Crystals grown using this method can be very large, more than 50 millimeters in diameter and 1 meter in length, and of very high purity. Each year producers using this method grow millions of carats of crystals.