Carolyn Pollack Sterling Silver Kyanite Clip Button Earrings Genuine Kyanite and .925 Sterling Silver Measures approximately 3/4" long x 5/8" wide See Ruler View for accurate sizing. Silver may tarnish over time. Handcrafted in America with lifetime warranty on all jewelry Blue kyanite sits amid swirls and beads of sterling silver for a perfect button earrings style.