25c. Red River turquoise

coin in the photo is a quarter. (cts = carats) (b = backed) (n = natural, not backed)

25a Red River Turquoise 26.5 cts (n)
25b Red River Turquoise 34.5 cts (set of 2) (n)
25c Red River Turquoise 25 cts (n)
25d Red River Turquoise 30 cts (n)
25e Red River Turquoise 20.5 (n)

From my personal stash of gemstones and other lapidary goodies

gemstone cabochons