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.
1.2 Biology (Of a cell, part, or tissue) in the earliest stage of development: primordial germ cells. More example sentences. 1  Embryonic stem cells are primordial cells with the ability to morph into any type of cell in the body.2  During human fetal development, the primordial germ cells migrate to and are incorporated within the developing ovary and are termed oogonia. Embryonic stem cells are primordial cells with the ability to morph into any type of cell in the body. 2  During human fetal development, the primordial germ cells migrate to and are incorporated within the developing ovary and are termed oogonia.