15.8 cts - Beautiful Untreated Blue Sapphire - Rough- 3.16 g

Sapphire is a precious gemstone variety of the mineral corundum, distinguished primarily by its range of colors, with blue being the most recognized. This 15.8-carat sample is an untreated rough blue sapphire, meaning it has not undergone heat or other treatments commonly applied to enhance color and clarity. Rough sapphires are highly sought after by collectors and gem cutters for their natural state and potential in jewelry making. The characteristic blue arises due to trace amounts of titanium and iron, and sapphires have a hardness of 9 on the Mohs scale, making them durable gems suitable for various types of adornment. Rough material can display inclusions and natural features that tell stories of their geological history and origin.