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 have the remarkable potential to develop into many different cell types in the body. When a stem cell divides, it can remain a stem cell or become another type of cell with a more specialized function, such as a skin cell.There are two types of stem cells, embryonic and adult. Embryonic stem cells are exogenous in that they are harvested from outside sources, namely, fertilized human eggs.. There is controversy surrounding the use of stem cells, as some experts say that any product that claims to affect the growth of stem cells or the replication process is potentially dangerous, as it may lead to out-of-control replication or mutation.