This .925 sterling silver statement ring features a vibrant cluster of sky blue topaz, white topaz, and London blue doublet quartz for a sophisticated, multi-tonal look. Sky Blue Topaz, White Topaz, and London Blue Doublet Quartz gemstones approximately 3.43 ct. tw. Material: .925 Sterling Silver Imported Sky Blue Topaz measures 6x6mm; White Topaz measures 5x7mm; London Blue Doublet Quartz measures 6x8mm; Metal weight is 2.38 grams Ring cannot be re-sized It is customary to treat most gemstones to achieve enhanced color and durability. Some of these treatments may not be permanent, and may require special care.