Yes we do. A PSer had a killer upgrade bc she bought her prior stone at a high and the value went towards the upgrade which was at a low.
Hi Paul, a point, most of the very large diamonds are not cut into a single stone - e.g. some of the big rough Graff has bought recently was cut into a dozen or more +2ct stones all D F or D IF.I agree with the two reasons brought up by Garry, but in the other order.
Yes, new technology in mining leads to a higher number of bigger rough stones, remarkably so in very big stones. But I cannot see this aspect having such a big scope as the following.
Indeed, the last few years has seen a number of very big diamond-companies folding or currently in the process of folding, with losses mainly for banks giving credit-facilities to the industry. Many of these cased had losses over $500M each.
This is a case of not only a few billions in these losses not available in the diamond-pipeline. All banks servicing the diamond-industry have become far more wary. A high number of diamond-companies are under bank-pressure to reduce their credit-line, some to zero, before very clear deadlines. For those companies under pressure, offloading bigger diamonds at lower prices is the least damaging option. Given the extent in which financing-money is leaving our industry, this is a far more important cause for the current price-decline of the bigger diamonds.
Live long,