How much is tanzanite earrings worth?

Tanzanite Mohs hardness: 6.5-7; density: 3.35 (+0.10, 0.25) g/cm3 1 carat is about 4 by 6 mm 300 carat thick fingers in about about 6 carats of good color color difference of around 2000 in more than 1000 of the weight of the greater the higher the price.