Global rough diamond production declined from 150 million carats to 120 million carats between 2018 and 2021. The largest producer by value, 8 of the 10 largest producing countries experienced declines in production, with only South Africa and Zimbabwe registering increases.

To help the jewellery industry solve this problem, the GIA has recently developed an automated instrument that can detect very small diamonds and will be launching a new testing service at the Appraisal Institute. As part of an ongoing research project into synthetic diamonds, the GIA has recently established a CVD growth laboratory where it is able to produce its own synthetic diamonds for use in research.

Loose cvd diamond supply outstripped demand, resulting in a greater year-on-year increase in the price of large carat finished diamonds. As diamond production declined, diamond prices continued to rise. De Beers, the world's largest diamond mining supplier, increased the price of rough diamonds by approximately 8% at its first trade fair in 2022, the fifth time since December 2021. The price index for finished diamonds jumped by 5.67% in the first month of 2022, the largest one-month increase in many years. Diamond prices declined in June due to relatively weak global economic expectations and an overall increase in finished diamond stocks, but still showed a significant year-on-year increase. According to Rapaport, the one-carat RAPI price index fell by 1.8% in June and rose by 16.8% year-on-year.

Cvd diamond offer an advantage in terms of value for money compared to natural diamonds, due to the continued expansion of lab diamond production capacity and decreasing production costs. As at the end of 2020, the price of  cultivated diamonds is only 1/3 of that of natural diamonds, and after further price increases for finished diamonds in 2021, the price ratio of cultivated diamonds to natural diamonds is likely to decline further.

Oldal: gia help the jewellery industry solve this problem
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