Scroll to see break-even price per barrel for oil in 2015 for select oil producers, and click on a country's name for more details. modest oil-price recovery and currency devaluations have lowered breakeven prices for countries like Russia and Nigeria, but some petrostates still need oil prices above $100 a barrel to balance their budgets.
There are dozens of types of gemstones â including diamonds, colored gemstones, and pearls â each with a unique set of physical and optical properties. GIRDLE â The narrow band around the perimeter of a polished or faceted diamond or colored gemstone.
Diamond Girdle Thickness. The girdle is the edge of the diamond and is quoted in either words (Thin, Thick etc) or as a percentage of the diameter (e.g. thin = .6% or thick = 3.0%). Bruting is the rounding process of grinding two diamonds against each other on a lathe that results in a ground glass like finish.