GIA DIAMONDS AND DIAMOND GRADING: ASSIGNMENT 5 QUESTIONS & ANSWERS

GIA DIAMONDS AND DIAMOND
GRADING: ASSIGNMENT 5 QUESTIONS
& ANSWERS
What shape is a diamond's unit cell?
A. Cube
B. Sphere
C. Pyramid
D. Cylindrical - ANSWER A. Cube

What is the optic character of a crystal when all light rays behave identically in all
directions?
A. Organic
B. Anisotropic
C. Singly refractive
D. Doubly refractive - ANSWER C. Singly refractive

What is the only way to accurately determine diamond type?
A. Spectroscopy
B. Specific gravity
C. Checking for strain
D. Checking for cleavage - ANSWER A. Spectroscopy

In diamond, what is a group of five carbon atoms with one at the center?
A. Unit cell
B. Octahedron
C. Tetrahedron
D. Trisoctahedron - ANSWER C. Tetrahedron

How are nitrogen atoms arranged in the diamond crystal lattice when diamonds first
form?
A. Pairs
B. Isolated
C. Groups of 4
D. Groups of 6 - ANSWER B. Isolated

How many directions of cleavage does diamond have?
A. Two
B. Three
C. Four
D. Six - ANSWER C. Four

What is the most important value factor for cuttable rough diamond?