There will be total lunar eclipses on December 21 (2010), June 15 (2011), and December 10 (2011). Solar Eclipses (shadow of the Moon partially or fully blocking the Sun) can occur two to five times a year, but the majority are partial eclipses. Total eclipses occur about once every 18 months, and affect a very limited area. The maximum coverage of the solar disk lasts between 6 and 7.5 minutes.
1 Quarter carat or less diamond, $125 to $500 set in 14 carat gold. 2  0.3 to half carat diamond, $750 to $1,000 set in 18 carat gold or platinum, possibly more if ASG/GIA certified.  For diamonds up to 0.75 carat, or smaller ASG/GIA certified stones, $1,000-$2,000.
In our example, â20 belowâ $7,600 per carat is $7,600 * (100%-20%), or $7,600 * 0.80, which comes to $6,080. Then you need to multiply that price by the weight to arrive at the final per diamond price ($6080 * 1.55 = $9,424). Sweet Spots of Value. Now, take another look at the sample âRap Sheetâ from before.herefore, diamond prices increase exponentially with weight, since their prices increase both due to the increased weight and due to the higher price per carat for the increased weight category.