Micro Express "Diamond Rough®" Training Course

Textbook Octahedral ABC Crystal

Ruler lines are in 1mm increments
Grid lines are in 2.5mm parallel increments

  1 2 3
B

 

B1

Average size = 5.8 ct. The three larger stones sitting on the micrometer have an average size of 11 carats each.

Octahedrons, some macles, dodecahedrons and some cleavage.

B2

Average size = 2.5 ct.Octahedrons, some macles and dodecahedrons as well as a small percentage of cleavage.

B3 Backlit view of sample A2.
Average size = 2.5 ct. Octahedrons, some macles and dodecahedrons as well as a small percentage of cleavage.

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Kenneth A. A. Glasser, DRE
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