Education

Cut Versus Shape (5.01)

The term cut is commonly interchanged with the term shape of a diamond.

Section 5: Cut

Section 5: Cut

Identifying the Cut Grade (5.44)

The general proportions and characteristics you will look for in an excellent cut grade for a round brilliant cut are:

The Modern Cut Grade System (5.43)

GIA's cut grade system is comprised of brightness, fire, scintillation, polish, symmetry and durability.

Diamond’s Containment of Light (5.06)

The design of the modern round brilliant is such that it “contains” the light that enters it as long as possible.

Single and Double Refraction (5.05)

Diamond is singly refractive -- but some gemstones are doubly refractive such as alexandrite, aquamarine, citrine, kunzite, corundum (ruby/sapphire), spinel, tourmaline, moissanite. Light bend as it enters the diamond but...