The honeymoon is over in Botswana. The diamond industry is floundering as jewellery sales stagnate with the slowdown in China. An index of rough diamond prices hit a five-year low last month.With most diamonds near the surface having been extracted from Botswana's mines, the gems are also becoming increasingly inaccessible. Last year, Botswana was overtaken by Russia as the world's top producer.To come: possible shaft closures, job losses and, according to De Beers, stagnating demand. The government says it must dip into its reserve fund to maintain spending and protect jobs."They have just had so much easy money for such a long time," WWW International Diamond Consultants founder and former sales director at De Beers, Charles Wyndham, said."They are perhaps a victim of having all their eggs in one basket."The Botswana Finance Ministry has cut its 2015 economic growth forecast by almost half to 2.6% and is predicting the nation's first budget deficit in four years. Besides the commodity slump, the country is also grappling with power and water shortages. ..