This model is based on a design developed for the size of
the diamond: the Zinnia.
The original outline was replaced by an octagonal shape. Too
delicate to be cut
Carefully by hand, facets starry flag, for their part
Been modified to facilitate its execution.
Plots flag give this design a good light.
The angles were changed and adapted to the size of a wider
range of gems
(Garnet, sapphire, spinal, ruby ...), which have a
refractive index lower than
That of diamond. They refract light in up to 84.3%.
This model includes as a main difficulty the size of facets
whose height
Is not determined by the presence of the intersection (meet
points faceting). This is the case
A facet whose height must match the respective third
pavilion and two-thirds
The crown. Novices faceting take care to replicate this
model on a stone
Low value in order to overcome the difficulties and avoid
errors at least
Expensive that would be likely to occur at the waist.
Description
|
For refractive index of 1.76
|
Index: 96
|
Number of faces: 73
(C = 24 P = 40 F = 8 T = 1)
|
Brightness: 84.3%
|
Volume: 0208
|
Length / Width: 1.0
|
Height of crown: 0221
|
Height of pavilion: 0747
|
Total height / width: 0631
|
Table / width: 0535
|
Instructions
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A. Pavilion
|
F. 90.00 06-18-30-42-54-66-78-90
Determine the diameter of the stone.
|
1. 51.68 06-18-30-42-54-66-78-90
Determine the level of the girdle.
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2. 43.71 04-08-16-20-28-32-40-44-52-56-64-68-76-80-88-92
Carved in third flag.
|
3. 42.00 02-10-14-22-26-34-38-46-50-58-62-70-74-82-86-94
Meets facets 1 and 2.
|
B. Crown
|
1. 40.60 06-18-30-42-54-66-78-90
Determine the height of the girdle.
|
2. 35.74 06-18-30-42-54-66-78-90
Carved in the second third of the crown.
|
3. 21.30 96-12-24-36-48-60-72-84
Meet facets 1 and 2.
|
T. Table 0.00.
|
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