Global Sapphire Jewellery Market Size, Share & Demand Report By Product Type (Rings, Necklaces & Pendants, Bracelets & Bangles, Earrings, Other Jewellery), By End-Use (Luxury, Fashion, Investment), By Distribution Channel (Offline Retail, Online Retail, Other Channels), By Price Range (Premium, Mid-Market, Affordable), By Region & Segment Forecasts, 2025–2030