Medium horse with San Marco pose in chalcedony made by master Oscar Zanetti. Calcedony is a type of opaque decorative glass obtained by adding and mixing silver salts and other coloring oxides in the melt which create the nuances of color. The prevailing tones of this chalcedony are light green and brown with some shades of blue. The crime. the tail and hooves are covered with 24 carat gold leaf. Certificate of guarantee and Murano authenticity stamp.