Formula for HCA

[aftereffects15]

What's the formula https://www.pricescope.com/tools/hca uses to calculate the score? I wasn't able to find a straight forward formula online - anyone know?

 

[kenny]

What's the formula https://www.pricescope.com/tools/hca uses to calculate the score? I wasn't able to find a straight forward formula online - anyone know?

Garry Holloway created the HCA, aka Holloway Cut Advisor.
I wouldn't be surprised if his math is proprietary, but it wouldn't hurt to email him and ask.

You can contact him through his website. http://www.hollowaydiamonds.com.au

 

[proto]

have a look at the patent if you really want to know, and Garry wont disclose.

 

[teobdl]

https://www.google.com/patents/US7251619?dq=7,251,619&hl=en&sa=X&ei=bMmlU5mPL4GR8gGTlYCgBA&ved=0CBwQ6AEwAA

The patent doesn't explicitly lay out the algorithm but it describes the methods and execution.