The term cat's-eye glass is used to describe a cabochon gemstone that features an interesting optic phenomenon called the chatoyant effect This effect is manifested in a narrow, sharp streak of light that goes across the stone resembling a cat's eye. Set in a silver tone pendant Wear on a chain or cord (not included) Vintage Unisex • Gently Used / Signs of Wear on the Metal Setting • Poshmark Ambassador II • Posh Mentor • 5 Star Rated Seller • Over 2400 Items Sold • Fast Shipper • Smoke Free/Pet Free Home Note: Colors may appear slightly different from photo due to lighting or screen resolution New to Poshmark? Use this code while signing up to save $10 on your first order - CASASTSOMEWHERE All the Best, @Casastsomewhere