Chrysocolla Ring with Marcasite Swirl Design | Sterling Silver Amethyst Should these treatments be compromised

Should these treatments be compromised

While gem limonite is not a variety of agate (despite being called "fire agate" by most in the industry)

back of piece signed "E J B ZUNI"

The Setting: Prong Set Sterling Silver Ring

Chrysocolla Ring with Marcasite Swirl Design | Sterling Silver Amethyst Should these treatments be compromisedA Bit About The Piece: Chrysocolla Ring with Marcasite Swirl Design set in Sterling Silver Details, details The Center Stone: Chrysocolla stone cut: Teardrop shaped cabochon stone measurement: 19. 32mm The Side Stones: Marcasite Melee stone cut: melee rounds stone measurement: 1. 69mm The Setting: Cabochon Set Sterling Silver Setting with Swirl Design . 925 sterling silver, solid ring size: 5. 75 About Chrysocolla: Chrysocolla, high grade material