These modified cuts tend to have a crushed ice or needle like facet pattern, more similar to a radiant cut than a traditional cushion cut. The chart below serves as a general guideline for evaluating the cut of a cushion cut diamond.
Broadly speaking, two types of stem cell can be distinguished: embryonic stem (ES) cells which can only be derived from preâimplantation embryos and have a proven ability to form cells of all tissues of the adult organism (termed âpluripotentâ), and âadultâ stem cells, which are found in a variety of tissues in the fetus and after birth and are, under normal conditions, more specialized (âmultipotentâ) with an important function in tissue replacement and repair.
Embryonic stem (ES) cells are also called totipotent cells. 1  The first steps involve making more cells by simple cell division: one cell becomes two cells; two cells become four cells, etc.  Each cell of early development is undifferentiated; that is, it is not yet specialized to carry out a specific body function.