The top diamond mining countries by production in 2022 were:

1. Russia: 34 million carats

2. Botswana: 25 million carats

3. Australia: 13 million carats

4. Democratic Republic of Congo: 12 million carats

5. Canada: 11 million carats

6. Angola: 9 million carats

7. South Africa: 7 million carats

8. Namibia: 2 million carats

It's important to note that production figures can fluctuate from year to year.