Shop › Sea glass and Ethiopean opal necklace Image 1 of 1 Sea glass and Ethiopean opal necklace $55.00 Clear sea glass bordered in sterling silver accented with an Ethiopian opal cabochon. Pendant is on a dainty sterling chain. Add To Cart Added! Clear sea glass bordered in sterling silver accented with an Ethiopian opal cabochon. Pendant is on a dainty sterling chain.