Many diamonds from the 19th century are equipped with old cut, also known as '' Old European Cut ''. These diamonds are provided with:
- A fairly smaller or larger table
- Octagonal facets on the table
- Deeper pavilions
- Shorter pavilion facets
Because these diamonds no longer meet the current standards of the modern brilliant, where the perfect '' triple excellent '' make is desired, diamonds above 0.50 carat are eligible to be resharpened to modern brilliant cut. Carat weight is lost during this process.
De Ruiter Diamonds first assesses the diamonds as to whether they are suitable for regrinding in the grinding shop. The starting point is that the 4Cs are examined and whether it is commercially interesting to have the diamonds resharpened.