pigmentary epithelium, pigmented epithelium. that made of cells containing granules of pigment. posterior epithelium. the single layer of epithelial cells on the back of the cornea, between stroma and aqueous humour; the corneal endothelium.retinal pigment epithelium. see retina.sense epithelium, sensory epithelium. see neuroepithelium (1).he single layer of epithelial cells on the back of the cornea, between stroma and aqueous humour; the corneal endothelium. retinal pigment epithelium. see retina. sense epithelium, sensory epithelium. see neuroepithelium (1).
Since at least the mid-19th century, doctors have known that silver or silver compounds can cause some areas of the skin and other body tissues to turn grey or blue-grey. Argyria occurs in people who ingest or inhale
Goldstone is a man-made glass filled with cuprous oxide which reduces to metallic copper during later annealing. It gives the material an aventurescent appearance.Goldstone has been produced in reddish-brown, blue, purple and green colors. It is usually cut en cabochon for use in jewelry as simulant of sunstone.The material can resemble lapis lazuli, if the glass host is blue.oldstone is a man-made glass filled with cuprous oxide which reduces to metallic copper during later annealing. It gives the material an aventurescent appearance.