Apatite Gemstones: The Classical Underdog Apatite is one of the most underestimated gemstones, considering the family it belongs to. A cool blue gemstone that derives its name from Greek word meaning “deceitful stone�, apatite is a misleading rock owing to its resemblance to other blue rocks like aquamarine beads, beryl, topaz gemstone and fluorite. Polishing and heat treatment with enhancing agents can make them deceivingly appear like sapphires and lapis lazuli. Let us explore the gemstone, which is everything but not deceiving.