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.
Average costs and comments from CostHelper's team of professional journalists and community of users. Just the stone for a flagstone patio can cost $3-$5 a square foot or more, depending on location and the type and quality of stone, or about $600-$1,000 for an average patio up to 10'x20,' and $1,200-$2,000 for a larger 20'x20' area.