The Hayek Cut For Gemstones
The Hayek cut was named after the Nobel Laureate economist F. A. Hayek. Although this design was developed to fit a specific piece of beryl rough, the cut can be very useful for faceting other kinds of gems, too. Any time you have a blocky piece of rough that is not square enough for an emerald cut, try the Hayek.
This beauty has a Barion style pavilion, which accounts for its great brilliance. The optical performance of this cut is outstanding in light to medium colored rough. However, I would caution against using the Hayek cut in darker rough.
This is a fairly simple design to cut. Now that you have it in your repertoire, you should find multiple uses for this diagram.
The Hayek Cut: Diagrams
The Hayek Cut: Instructions
- Angles for R.I. = 1.56
- 45 facets + 4 facets on girdle = 49
- 96 index
- L/W = 1.500 T/W = 1.066 T/L = 0.710
- P/W = 0.807 C/W = 0.110
- H/W = (P+C)/W+0.02 = 0.937
- P/H = 0.862 C/H = 0.117
- Vol./W^3 = 0.628
|1||43º||96-06-12-18-24-30-36-4248-54-60-66-72-78-84-90||Cut to temp center point (TCP)|
|2||90º||44-92||Meet with step 3 at edge from step 1|
|3||90º||24-72||See step 2|
|4||75.5º||24-72||Meet at 1-2-3|
|5||75.5º||44-92||Meet at 1-2-3|
|6||42º||09-57||Add the mains last|
|a||42º||04-52||Steps a to f meet at corners|
|T||0º||Table||Meet h-d-e-g and g-f-c-h|