Which gold alloy is 50% pure gold?

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Study for the DCA Gemology Test. Utilize flashcards and multiple-choice questions, each question offering hints and explanations. Prepare effectively for your exam with confidence!

Multiple Choice

Which gold alloy is 50% pure gold?

Explanation:
In gold karat system, the total parts are 24, and 24K is pure gold. The fraction of gold in an alloy is karat divided by 24. Fifty percent gold means 12 out of 24 parts are gold, so the alloy is 12K. The other options correspond to different gold contents: 10K is 10/24 (about 41.7%), 14K is 14/24 (about 58.3%), and 18K is 18/24 (75%). Therefore, only the 12K alloy is exactly 50% gold.

In gold karat system, the total parts are 24, and 24K is pure gold. The fraction of gold in an alloy is karat divided by 24. Fifty percent gold means 12 out of 24 parts are gold, so the alloy is 12K.

The other options correspond to different gold contents: 10K is 10/24 (about 41.7%), 14K is 14/24 (about 58.3%), and 18K is 18/24 (75%). Therefore, only the 12K alloy is exactly 50% gold.

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