sz6 Vintage Southwestern Sterling high grade turquoise ring. This ring was part of a collection of Native American jewelry most of which was from the first half of the 20th century. But it has a KBN and Ster inside...possibly early Kabana. Hard to imagine, great looking ring.
All precious metals are tested and guaranteed, any Native American jewelry referred to as Silver or Sterling is guaranteed to be a minimum of 90% (coin) silver and possibly higher content. Anything marked is guaranteed to be what it's marked, most bracelets are photographed on a 6" wrist (non hairy), rings photographed on the appropriate sized finger when possible. With bracelets if the measurement is not given in the description then inside circumference is shown where the metal meets the number on the the cloth tape measure.