1.   Because larger diamonds are rare, carat weight contributes to value.

2.   U.S. and Bahamian aviation officials continued searching for clues Tuesday, saying they would investigate whether excess weight from the production equipment contributed to the crash.

3.   U.S. and Bahamian aviation officials searched for clues Monday saying they would investigate whether excess weight from the production equipment contributed to the crash.

4.   U.S. space officials have also said that the Progress might have been overloaded, and the extra weight might have contributed to the crash.

5.   U.S. and Bahamian aviation officials searched for clues Tuesday, saying they would investigate whether excess weight from baggage and equipment contributed to the crash.

6.   U.S. space officials have said that the Progress may have been overloaded, and the extra weight might have contributed to the crash.