What has been a notable effect of the increase in the world’s supply of diamond rough?

The notable effect of the increase in the world’s supply of diamond rough is a decrease in diamond prices globally. When the supply of any commodity rises significantly, the basic economic principle of supply and demand comes into play. With a larger supply of diamond rough in the market, there is greater availability, which typically leads to lower prices, as surplus stocks may outstrip consumer demand. This situation means buyers can negotiate better prices, ultimately resulting in more competitive pricing for diamonds in general.

In contrast, while there may be rising popularity for lab-grown diamonds or improvements in employment in mining areas, these factors are not direct consequences of the increase in the supply of diamond rough. Similarly, improvements in diamond quality standards are more related to industry regulations and market demands rather than an increase in supply. Thus, the decrease in global diamond prices is the most direct and notable effect stemming from an increase in the availability of diamond rough.