💎61+ Ct Certified Mystic Topaz – Square Cut Rainbow Fire Gemstone. Gem Type: Mystic Topaz. 🌈Rainbow Fire Brilliance: Displays multiple colors under varying light. Color: Rainbow Multi-Color. Displaying a vividrainbow fire effect, this gemstone radiates stunning shades of violet, blue, green, and gold — a breathtaking piece that brings life and vibrance to any jewelry design or collection.