Classic Blue Sapphire and Diamond Three Stone Engagement Ring (5mm Blue Sapphire) Classic Blue Sapphire and Diamond Three Stone Engagement Ring Platinum (5mm Blue Sapphire) Total Carat Weight of Blue Sapphire is 0.6ct. and Total Carat Weight of Diamond is 0.21ct. Available in various sizes between size 3 to 13. Please contact us for more info. Free Certificate of Authenticity. Easy Returns - If you are not 100% satisfied with your purchase, you can return it for a full refund or exchange it within 30 days of the shipping date. Returns, including free gifts, must be unworn and in the state that you received them. Angara offers high-quality gemstone jewelry in a variety of appealing designs. All the gems are sourced directly from mines and manufacturers. The exceptional craftsmanship ensures that every jewelry piece will last for generations.