GIA Diamond and Diamond Grading Final Exam | Questions And Answers Latest {2024-
2025} A+ Graded | 100% Verified
How are gem-quality rough diamonds sorted? - weight, shape, clarity, and color
What is a downstream segment of the mine to market diamond journey? - Selling to a customer via
diamond jewelry retail
What describes a larger organization buying and joining smaller companies? - Consolidation
What region was the heart of the diamond rush in South Africa? - Kimberly
What diamond's discovery led to the modern diamond industry? - The Dudley- star of South Africa
What is characteristic of minerals? - Natural inorganic substance with chemical composition and
characteristic structure
What layer is molten? - Outer core
Where are most diamond deposits found? - Cratons
Where do most diamonds form and reside? - Within the mantel keel under cratons
What is an example of a superdeep diamond? - Juina
What kind of rock creates a primary diamond deposit? - Kimberlite
How do geologists locate cratons? - geological mapping
How does ore removal start in a primary deposit? - Open-pit mining
, What might perovskite in a mineral sample indicate? - A diamond pipe/source deposit is nearby
What is the rock that covers a pipe? - overburden - also called yellow ground due to yellow color
Which subatomic particle has no electrical charge? - Neutron
What can the diamond type classification system help to identify? - Lab-grown diamonds
What is another name for the cubic system? - Isometric
What is the surface in a twinned crystal where the diamond's growth direction changes? - Twinning
plane
What is a rough diamond's value based on? - Facet gem potential
What type of radiant energy is found on the electromagnetic spectrum? - X-ray
What causes steps in a diamond's band gap? - A constant energy differences. How much energy an
electron requires to move across the gap
What do electrons do when visible light is emitted during luminescence? - Return to stable state
What subatomic particles interact with light to produce color? - Electrons
What does irradiation create when it displaces carbon atoms in the crystal lattice? - Vacancies
What is refraction? - The change in speed and possible change in direction of light as it travels from one
material to another
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