Diamond Glossary

Baguette - See Shape.

Similar to (and often even confused with) emerald cut diamonds, the baguette cut is a rectangular shaped stone often featured in engagement rings. The baguette is is narrower than the emerald however and is typically a shoulder or accent stone rather than the center stone. For this reason, baguette diamonds are typically small in size.

This step cut stone often features 14 facets. It does not feature the same brilliance as the classic round brilliant cut diamond any flaws in the stone are easily visible.

Bearded Girdle - Small hairline fractures running from the girdle into the gemstone.

Also known as “bearding”. This is typically as a result of the cut and polishing process if it is done too quickly or without enough care. It can also simply be caused by general wear and tear. The girdle of a diamond is a vulnerable part of the stone and can chip or fracture over time. In order to avoid this, it is recommended that you have sufficient prongs as they protect the diamond. Mountings such as bezel sets also protect the stone efficiently. It also worth considering removing the ring if you know that you are about to partake in a physical activity in which your diamond could undergo damage.

Bezel - The large facets (second to the table) on the crown of a diamond.

A diamond’s crown (the top part of the stone) is made up of the table and multiple facets. Light enters through these facets and creates the shine and brilliance that round diamonds are renowned for. The bezel facets are located between the table and the girdle and are diamond shaped. Round diamonds typically have 8 bezel facets.

Black Pique - The black inclusions visible within a diamond.

These are more detrimental to the diamond’s value than white (or clear) imperfections. Despite this, a diamond grading report will often treat white and black inclusions the same for clarity grading purposes.

Blemish - An imperfection on the surface of a diamond.

A diamond can be internally flawless (IF), even if it has blemishes, including scratches, nicks and abrasions. Blemishes can usually be easily removed by polishing.

Bow Tie Effect - A dark shadow shaped like a bow tie.

This effect is evident in some cuts of fancy shaped diamonds, such as ovals and marquises. This is detrimental to the value of the diamond, but not significantly

Brilliance - Also called Brightness.

Brilliance is the effect of all the reflections of white light, both within and external to the diamond. The degree of brightness displayed is correlated to the diamond’s cut grade. A diamond exhibiting a high level of brightness will attain a very good or Excellent cut grade, for example. Whereas, a diamond exhibiting low brightness would probably attain a Poor cut.

Brilliant Cut - The optimal cut of a diamond so as to provide maximum brilliance.

A round brilliant has 57 or 58 facets (including the culet). Many fancy shapes have brilliant versions, including the cushion modified brilliant, the square modified brilliant (also known as the princess cut) and marquise brilliant.

Bruise - An inclusion (of small cracks or feathers) at, or near, the surface of a diamond.

These are more detrimental to the diamond’s value than white (or clear) imperfections. Despite this, a diamond grading report will often treat white and black inclusions the same for clarity grading purposes.