You can buy a diamond-making machine for $200,000 on Alibaba
Briefly

The growing accessibility of diamond-making machines reflects trends toward democratizing diamond production, which began in the 1950s with the first lab-grown diamonds. Today's advancements, such as HPHT and CVD processes, illustrate significant progress in this sector. However, operating these machines is complex and requires expertise alongside substantial resources for effective production.
Although you can now purchase a diamond-making machine online for $200,000, the reality of operating this equipment demands more than just an initial investment. With HPHT presses needing precise control systems and quality materials, and CVD machines requiring controlled gas supplies for synthesis, the task is not for the untrained. It showcases the intricate and skilled nature of diamond production.
Read at Ars Technica
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