Our company Rare Stones is in HK since 1988. www.rarestoneshk.com This Ring is made from 18k Gold and Natural Diamonds. Item 28 - Tourmaline Ring Gold 18k Dia.: 0.28 ct Yellow Sapphire: 0.34 ct Stone: Tourmaline 4.48 ct Original selling price in Shop: HKD 11,500. Free shipping using SF-