GIA Diamonds and Diamond Grading- Assignment 5 Questionnaire with Solutions

GIA Diamonds and Diamond Grading:
Assignment 5 Questionnaire with
Solutions




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



What is the regular, repeating pattern of atoms in a mineral?

A. Habit

B. Cleavage

C. Crystal system

D. Crystal structure - Answer-D. Crystal structure



What forms when a crystal's growth stops and then grows in a different, symmetrical direction?

A. Glassie

B. Carbonado

C. Octahedron

D. Twinned crystal - Answer-D. Twinned crystal



Which type of growth mark indicates an octahedral crystal face in diamond?

A. Trigons