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 derived from several sources in the body. They are found in mature body tissues, umbilical cord blood, fetal tissue, the placenta, and within embryos. Stem cells develop into tissues and organs in the body. In some cell types, such as skin tissue and brain tissue, they can also regenerate to aid in the replacement of damaged cells.