DFJ Glossary
Learn about many of the terms used in fine jewelry.

The component of a stud earring that is pierced by the post and allows it to sit securely on one’s ear. As with the post, the back can function by friction or screw.

The glow that can sometimes be emitted from a stone when exposed to UV light. Can appear in a variety of colors including blue, yellow, and even orange.

Elemental symbol: Au
Derived from the Latin word, ‘aurum’. It is naturally yellow and malleable. In pure form (24 karat) it is not suitable for fine jewelry. However, some parts of the world cherish gold in the 20-24 karat purities.

Highest portion of the ring.

The term used with a number, to represent the relationship of gold to other alloys. Also represented as the initial "K" or "KT". 14K = 58.3% Gold. 18K = 75% Gold.

Similar in shape to a football, this cut features dualling points that seemingly draw the sparkle outward.

Intricate technique where metal is cut in a beaded or dotted fashion to enhance the borders within a piece of jewelry.

The elongated modification of the round brilliant diamond. Popular for its ability to seemingly lengthen the wearer’s fingers.

French for ‘paved’, this refers to the setting of small diamonds, close in proximity to one another in multiple rows.

Elemental symbol: Pt
Derived from the Spanish word, ‘platina’, meaning “little silver”. For jewelry, it has a fineness of 90%-95%.

A step cut diamond shape that features long parallel facets with angled corners. Cherished for its elegant appearance.

The slim section between the pavilion and the crown of the diamond essentially creating a boundary between the portions of the stone.

Rim of gemstones surrounding a central gem.

A flaw internally, within a gemstone.

A method of jewelry production and repair, that harnesses a precise beam of energy to heat a small area without disruption to the metal or gemstones around it.

Diamonds weighing up to or less than 0.25 carats.

Also expressed as "mm". The standard unit of measurement for jewelry. Can be used to measure thickness of a ring, dimensions of a gemstone, and more.

The part of the diamond below the girdle.

A harmonious blend of a round brilliant and marquise cut diamond, often referred to as a teardrop or pear modified brilliant.

Equal to 1/100 of a carat (0.01). A weight of 0.05 carats can be referred to as "5 points".