Diamond And Diamond Grading Practice Exam

Which method uses X-rays to detect diamonds and an air jet to remove them from ore?

A method to sort diamonds by color A method to weigh diamonds by density A recovery method that uses X-rays to detect diamonds and an air jet to remove them from ore A method to cut diamonds

Correct Answer:

A recovery method that uses X-rays to detect diamonds and an air jet to remove them from ore

Explanation:

Automated X-ray ore sorting is the method in question. It uses X-ray transmission to differentiate diamonds from the surrounding ore because diamonds attenuate X-rays differently than most other minerals. When the ore passes by the detector, diamonds create a distinct signal, and an air jet promptly removes that portion of material, capturing the diamonds for recovery. This approach is purpose-built for separating diamonds early in processing, unlike color sorting or density-based methods or cutting, which don’t use X-ray detection.

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