THE TANZANITE Cs

Njaro Tanzanites are graded according to a set of standards developed by the European Gemological Laboratories based on colour, clarity, cut and carat weight – the four Cs.

Colour

Hue: Colour ranges from a slightly violetish blue straight through to a slightly bluish violet (to indicate either a blue or violet dominance). Saturation: The intensity of the colour.

Clarity

Natural flaws or imperfections in the stone are graded from the exceptional LC (loupe clean) clarity to less desirable HI (heavily included).

Cut

Stones are graded from excellent (the finest overall finish of the stone) to poor.

Carat

As with diamonds, the value of a Tanzanite is also graded according to its weight, which is naturally influenced by the stone’s cut.