Prospects for diamond prices are looking brighter as a multitude of factors are set to drive up costs in the coming years. What Happened: A plethora of elements including tighter supply, increased demand, and a predicted surge in weddings are all contributing to the optimistic market outlook, Business Insider reported on Monday After a year of declining sales and tumbling prices in all categories of diamonds, the industry is now on the edge of a turnaround. Diamond prices have shown signs of recovery in recent months, with the International Diamond Exchange’s Diamond Index surpassing a level o…