4C's
What does a diamond’s cut primarily refer to?
The symmetry and proportions of its facets
How many years ago were diamonds formed beneath the Earth's surface?
3 billion years ago
Why are proportions important in fancy shape diamonds?
They affect brilliance, fire, and overall appearance
Which trace element is primarily responsible for the blue color in diamonds?
Boron
Which trace element is not commonly linked to fancy color in diamonds?
Calcium
Which diamond cut allows for a Triple Excellent (3X) grade due to its standard 58 facets?
Round Brilliant Cut
At what depth are diamonds typically found below the Earth's surface?
125 miles
Do fancy shape diamonds receive a GIA cut grade?
No, they do not
What trace element causes yellow coloration in diamonds?
Nitrogen
By 1900, what percentage of the world’s rough diamond production did De Beers control?
90%
On the GIA diamond color scale, which letter grades are considered colorless?
D-F
What is the name of the vertical rock structures that form as magma cools and hardens?
Kimberlite Pipes
What is the purpose of knowing length-to-width (L/W) ratios when sourcing a diamond?
To communicate client shape preferences efficiently
Green diamonds get their color from:
Radiation
Which trace element can make diamonds appear orange?
Nitrogen atoms that absorbs blue and yellow light
What are internal imperfections in a diamond called?
Inclusions
Which country dominated the diamond market for over 150 years after India’s supply declined?
Brazil
An oval diamond with a 1.30 L/W ratio will appear:
Short and Wide
Which GIA color grade marks the transition from the colorless scale to the fancy yellow scale?
Z+
What is the Kimberly Process?
Kimberley Process is an international agreement among governments, the diamond industry, and civil society groups. This is to prevent “conflict diamonds” — rough diamonds used to finance wars and rebel movements — from entering the mainstream diamond market.
Why might two diamonds of the same carat weight look different in size?
Different Cut Proportions
What is the average temperature and pressure at the depth where diamonds form?
2372°F and 50,000 times atmospheric pressure
List all step cut diamond shapes that we carry in our store (7 total)
Emerald, Asscher, Baguette, Tapered Baguette, Alara, Blaze, and Pear !
Which of the following is the main cause of a black diamond’s color?
Graphite inclusions or a high concentration of dark inclusions
Which trace element is responsible for brown diamonds’ color?
Structural Impurities and Nitrogen Impurities