The Macle is the most common twinned diamond crystal form.

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Prepare for the Gemological Institute of America's Graduate Diamonds Exam. Enhance your expertise with comprehensive quizzes and insightful explanations. Be ready to excel!

Multiple Choice

The Macle is the most common twinned diamond crystal form.

Explanation:
Twinned growth in diamonds creates a macle, a two-part crystal that forms when two diamond crystals grow together along a common twinning plane. This distinctive intergrowth is the most common twinned crystal form seen in rough diamonds, which is why the statement is correct. The other terms refer to standard single-crystal shapes diamonds can take—such as cube or dodecahedron—and one option listed isn’t a recognized form, so they don’t describe the common twinned structure.

Twinned growth in diamonds creates a macle, a two-part crystal that forms when two diamond crystals grow together along a common twinning plane. This distinctive intergrowth is the most common twinned crystal form seen in rough diamonds, which is why the statement is correct. The other terms refer to standard single-crystal shapes diamonds can take—such as cube or dodecahedron—and one option listed isn’t a recognized form, so they don’t describe the common twinned structure.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy