Amberina glass ranges in shades of light to dark red and sometimes fuchsia at the top to shades of light to darker amber at the bottom, or visa-versa in which case is it called reverse Amberina. It is created by mixing a compound including gold in the glass and reheating the object before it completely cools. The major producer of Amberina in the U.S. was the New England Glass Company, Toledo, Ohio, who patented the process in 1883 and thus prevented competitors from making the glass without a license. It's successor, the Libbey Glass Company made the glass into the 1890's
This lovely Amberina punch cup is barrel-shaped with an inverted baby thumbprint pattern and applied reeded handle. The shading is a lighter red, with fuchsia tinge, to lighter amber with polished pontil. The mug measures 2 3/4" in height and 2 1/2" across the top. Possibly a product of the Libbey Glass Company. Colors are darker than in the photos. There are no cracks, chips or repairs.