It is found in abundance on the island has many application. Zircons are broadly classified in to industrial and gem quality materials. According to their physical properties there are two types of material called “low and high” zircons. Locally gem quality zircons are referred to as “jargon”. Zircon is the most lustrous gemstone found in Sri Lanka. Zircons are commonly found as inclusions in Sri Lankan sapphires surrounded by circular dark area known as the “zircon haloes”. Zircon is found in red, brown, green and golden colours. Locally colorless zircon used to be called “Mathara Diamond” due to its supreme lustre as well as other characteristics similar to real diamond.