The large scope of potential global public health threats is recognized in the revised International Health Regulations (IHR [2005])3 with its all-hazards approach to assessing serious public health threats.
How much is it? On average, a high-quality peridot stone can cost anywhere from $50 to $200+ per carat. Larger peridots that are exported from foreign countries can cost as much as $500+ per carat. Generally, stones mined from Burma, Pakistan and Arizona can command the highest prices.
If the stone sold at a 25 percent discount, its price per carat would be $1,300 x 0.75 = $975/ct. and the price per stone, $975 x 0.39 ct. = $380.25. To locate the per-carat price for a parcel of 0.18 to 0.22 carat diamonds with an average color of I-J and clarity SI2, select the 0.18 to 0.22 carat size matrix.