💎 Sapphire: The Rainbow Gemstone of Corundum 🔵 1. What Exactly Is Sapphire? Sapphire is a precious variety of corundum, a crystalline form of aluminum oxide — Al₂O₃. But here’s the fascinating part: ❤️ Red corundum = Ruby 💎 All other gem-quality colors of corundum = Sapphire That means sapphire isn't only blue! 💛 Yellow 💚 Green 🩷 Pink 🟣 Purple & violet 🧡 Orange ⚪ Colorless 🔵 Blue And some sapphires can even show multiple colors or color zoning within the same crystal. 🧪 2. What Gives S