History of Diamond Grading in Australia

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Explore DCLA’s legacy as Australia’s leading diamond authority. Learn our history, meet the founders, and discover our unmatched grading expertise.

Pavilion Angle

The pavilion angle is a key proportion in diamond cutting, referring to the angle between the girdle[…]

Pavilion Depth

The pavilion depth refers to the vertical distance from the girdle (the widest part of the diamond)[…]

Pavilion

The pavilion is the lower portion of a diamond, extending from the girdle (the widest part) of[…]

Old Mine Cut

The Old Mine Cut is a historical diamond cut, first popularized in the 18th and 19th centuries.

Oval shaped diamond
Oval Cut

The oval cut is an elongated shape that can range from a perfect oval to a more[…]

chip
Nick

A nick is a small surface blemish found on a diamond, typically appearing as a tiny break[…]

Rough diamond Octahedron
Octahedron

An octahedron is one of the most sought-after crystal shapes for rough diamonds, featuring eight triangular faces[…]

Trade term for a diamond that has been badly polished or finished.
Off-Make

The term "off-make" is a trade term used to describe a diamond that has been poorly cut,[…]

A natural diamond is a gemstone composed of crystallized carbon
Natural Diamond

A natural diamond is a gemstone composed of crystallized carbon that was formed deep within the Earth's[…]

Needle Inclusion in Diamonds
Needle

A needle inclusion is a type of internal characteristic found in natural diamonds. It appears as a[…]

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