Histology slide of a solar lentigo. Liver spots (also known as age spot, solar lentigo, Lentigo senilis, Old age spot, Senile freckle) are blemishes on the skin associated with aging and exposure to ultraviolet radiation from the sun.istology slide of a solar lentigo. Liver spots (also known as age spot, solar lentigo, Lentigo senilis, Old age spot, Senile freckle) are blemishes on the skin associated with aging and exposure to ultraviolet radiation from the sun.
Tanzanite is a stone of transmutation, shifting from lilac-blue to sapphire blue and into deep blue-violet. In faceted form it is stunning, celebrated as the Gemstone of the 20th Century and first promoted by the New York jewelers, Tiffany & Co. who created magnificent pieces to showcase this stone.
December has three birthstones assigned to it, zircon, turquoise, and tanzanite, which was added in 1912. Tanzanite was discovered in the 1960âs in Tanzania. It ranges in color from blue to purple. This stone is frequently heat treated to achieve an optimum violet-blue color.