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.
Tanzanite was discovered in 1967 at the worldâs sole deposit not far from Tanzaniaâs Mount Kilimanjaro and the town of Arusha in the arid Merelani foothills that rise from the hot Sanya plains. Segmented into four âblocksâ (A, B, C and D), the Tanzanite deposit scarcely covers 20 square-kilometers.