Hearts and arrows

Hearts and Arrows Diamonds

Hearts and arrows diamonds originated in Japan in the mid-1980s.
They are cut to ideal proportions based on Marcel Tolkowsky's book 'Diamond Design.'
Less than 1% of the world's diamonds are cut to hearts and arrows optical symmetry precision.
This cut requires additional polishing and results in more waste of the original rough diamond material.
Hearts and arrows diamonds are more expensive than average cut diamonds.

A hearts and arrows scope is used to see the hearts and arrows pattern in a diamond.
The scope analyzes the physical symmetry, contrast, and alignment of facets.
It allows viewing the diamond from both the top (crown) and bottom (pavilion) to reflect light from specific facets and angles.
The viewer uses white and colored light at set angles to catch and reflect light.
The hearts and arrows pattern can be observed through the viewer.

In the early 1990s, hearts and arrows cutting was uncommon in America.
The Gemological Institute of America identified key characteristics of hearts and arrows diamonds.
HRD, IGI, and WTOCD are laboratories that certify hearts and arrows diamonds.
HRD developed proprietary software to analyze the images according to H&A guidelines.
Hearts and arrows diamonds command a price premium due to their better overall cut quality.

There is disagreement in the diamond industry regarding which diamonds should receive the hearts and arrows label.
The term 'super ideal' is often used to describe diamonds with perfect optical symmetry.
Most diamonds with an Excellent cut grade will display some hearts and arrows pattern.
Some believe that only diamonds with a perfect hearts and arrows pattern should be called hearts and arrows.
Specific guidelines define the components of a hearts and arrows super-ideal cut diamond.

Morse, Tolkowsky, Higuchi, and others have contributed to the development of hearts and arrows diamonds.
The DNA of hearts and arrows diamonds can be explored.
The website heartsandarrows.com provides information on hearts and arrows diamonds.
The H&A Viewer is a tool used to examine hearts and arrows diamonds.
Additional references and resources can be found for further study.

Reference	URL
Glossary	https://harryandcojewellery.com.au/blogs/glossary/hearts-and-arrows
Wikipedia	http://en.wikipedia.org/wiki/Hearts_and_arrows
Wikidata	https://www.wikidata.org/wiki/Q5693020
Knowledge Graph	https://www.google.com/search?kgmid=/m/02mx8y