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Everything you need to know about Asscher cut diamonds

There are many different shapes of diamond used in jewellery and each different shape, or cut as they’re referred to in the industry, has its own history. The Asscher cut is no different, with a story behind its invention, popularity, decline, and recent re-popularisation. Although it’s not currently one of the most common cuts, the Asscher cut’s history is rich and had moments of huge popularity.

What is an Asscher cut diamond?

Also known as the square emerald cut, Asscher cut diamonds are roughly square in shape when viewed from above but have cut corners for more light to enter the diamond. They typically have 50 or 58 facets and their ideal length to width ratio is 1 to 1.04. Because of their many facets, high crown, and depth, they can produce outstanding brilliance and create a ‘hall of mirrors’ effect.

What is a Royal Asscher cut diamond?

  • Rarer than the traditional Asscher cut, the Royal Asscher cut is perfectly symmetrical and has a higher crown.
  • With 74 facets compared to 50 or 58, Royal Asscher cut diamonds are even more brilliant and reflective than their predecessor.

When was the Asscher cut invented?

The Asscher cut was invented in 1902 by Joseph Asscher, the artisan diamond cutter who founded the I.J Asscher Diamond Company, now known as the Royal Asscher Diamond Company. It was the first patented diamond cut, protecting it from replication from other companies

The Asscher cut was a staple of art deco jewellery, with its straight lines and brilliance making it perfect for the movement.

large asscher diamond

When was the Royal Asscher cut invented?

  • Much later, at the turn of the millennium in 2001, Edward and Joop Asscher set out to improve upon their great-grandfather’s cut and created the Royal Asscher cut diamond.
  • Modern diamond modelling and cutting technology meant that they could improve on the accuracy of the cut, add facets, and create a diamond that reflected more light than the original Asscher cut.

The full Asscher cut history and the Asscher family

  • The Asscher cut was invented in 1902 by Joseph Asscher who received a patent for the cut, protecting it up until WWII.
  • In 1903, Joseph’s son, Abraham Asscher cuts the world’s largest diamond at the time, The Excelsior, into ten stones.
  • Then, 1905, the Cullinan diamond was found and in 1908, Joseph Asscher cut it into 9 stones. Some of which are now part of the crown jewels
  • The Art Deco period saw a huge rise in popularity of the Asscher cut diamonds with its long lines and bold shape.
  • The Asscher cut patent expired during WWII, leaving competing diamond cutting companies to replicate the stone but with lower quality results.
  • Then, in the 1980’s, Queen Juliana of the Netherlands granted the Asscher Diamond Company a royal title to commend their prestigious position in the diamond industry.
  • And finally, in 2001, Joseph Asscher’s grandchildren reinvents the cut as The Royal Asscher Cut.

Now that you know the history of this incredible stone, take a look at our collection of GIA certified Asscher cut diamond engagement rings.

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