Vintage Navajo Sterling Silver Petit Point Ring Size 4 1/2

Gorgeous vintage sterling silver Zuni turquoise Petit Point ring. This beautiful piece features sleeping beauty(?) Long oval cabochons set in sterling silver in the petit point style. This is not marked. You can see 2 darker cabs in the photos. This is not a lighting issue. Those 2 cabs are, in fact darker than the others. All cabs appear to be original. Under loupe magnification, the cab in the top corner, closest to the 2 darker turquoise has a small crack, but none of the cabochons are loose. This is a size 4 1/2 (truly petite)