What Is The Densest Gem?
What Is The Densest Gem? Gem Variety Density Chemical Composition Sapphire3.95-4.03 Aluminum oxide Star Sapphire 3.95-4.03 Aluminum oxide Zircon 3.93-4.73 Zirconium silicate Almandine Garnet 3.93-4.30 Iron aluminum silicate Is diamond denser than emerald? The carat of a gemstone is calculated using its weight. Carat for carat, emerald comes out on top when compared to diamond.