Zircon from Vietnam 9.70 ct

Natural zircon is a transparent stone of various colors and shades with strong iridescent flashes.
However, there is a strange and erroneous opinion among the people that zircon is a synthetic and not a natural stone, associating it with cubic zirconia (cubic zirconium). This zircon from Vietnam has an interesting brownish hue that makes it look like a diamond. The peculiarity of this zircon from Vietnam is that, depending on the lighting, it can have either a brownish tint or a steel gray.