These 10k yellow gold earrings feature 2 ct. t.w. Swiss Blue Topaz that measures 4.57-millimeters long x 4.57-millimeters wide. Almost all gemstones have been treated to enhance their color and require special care. 2 Swiss Blue Topaz Post back earring Prong setting Imported Belk Exclusive Product Specifications 4.57 mm L x 4.57 mm W 2 ct. t.w. Swiss Blue Topaz Material & Care 10K Yellow Gold Use gold polishing cloth on gold items