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.
Maximum: $250/sf. The cost of onyx countertops is expensive in itself. On average, prices can range between $40/sf on the low side to $250/sf on the high side. One factor that will greatly increase the price is the size of the onyx slabs installed. Onyx is a very brittle material and should only be installed by a professional.