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.
Stem cells are characterized by their ability for self-renewal (i.e., maintaining their undifferentiated state during several rounds of cell division), and their potency (i.e., the ability to differentiate into specialized cell types). The two main stem cell types are embryonic stem cells (ES) cells and adult stem cells (i.e., somatic stem cells). Other types, such as induced pluripotent stem cells (iPSCs), are produced in the lab by reprogramming adult cells to express ES characteristics. Embryonic Stem Cells Embryonic Stem Cells Adult Stem Cells Adult Stem Cells Induced Pluripotent Stem Cells Induced Pluripotent Stem Cells.