Unique Keyhole Core Tourmaline • 3.75 ct • Double Pink Core with Extraordinary Motif - Height: 10 mm - Width: 9 mm- 0.75 g - (1)

Tourmaline is a complex boron silicate mineral known for its impressive color range and crystalline formations. The specimen described features a unique keyhole core motif, a rare internal pattern within the stone that enhances its appeal to collectors and gem enthusiasts. This particular tourmaline is a double pink core variety, indicating internal zoning with two distinct pink areas, which can captivate viewers with its extraordinary visual depth and structure. Weighing 3.75 carats, this tourmaline's dimensions and distinct coloration make it an exceptional example of the gem's diverse aesthetics. Tourmaline crystals are celebrated for their pleochroism, meaning they show different colors when viewed from various angles. This gem type is also known for its relatively strong hardness and strong electric properties when heated or rubbed. The unique internal core pattern adds an artistic dimension, making this gem both a scientific curiosity and a beautiful specimen suitable for jewelry or collection.