Rose Egg 480a-80 by Bob Keller

Rose Egg 480a-80 - designed by Bob Keller ©1999
480 facets80 index
L/W = 1.000 H/W = 1.300Vol./W^3 = 0.662

Hemisphere A
p90.0002-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Cut to equal depth, set size
183.2402-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Cut level girdle (equator) line
278.9080-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76Meet p,1
364.9480-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76Meet 1,2
461.40 02-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Meet 1,2,3
546.3202-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Meet 3,4
644.0880-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76Meet 3,4,5
727.6280-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76Meet 5,6
826.6902-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Meet 5,6,7
99.1402-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Meet 7,8,apex (pole)
Hemisphere B
a88.7302-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Meet 1,2 on hemisphere A
b84.2880-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76Meet 1,2 on hemisphere A, a
c81.5180-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76Meet a,b
d77.1802-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Meet a,b,c
e73.6702-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Meet c,d
f69.6480-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76Meet c,d,e
g64.7980-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76Meet e,f
h61.2402-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Meet e,f,g
i54.3302-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Meet g,h
j51.4880-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76Meet g,h,i
k41.6880-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76Meet i,j
l39.7802-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Meet i,j,k
m26.4702-06-10-14-18-22-26-30-34-38-42-46-50-54-58-62-66-70-74-78Meet k,l
n25.6080-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76Meet k,l,m
o9.0880-04-08-12-16-20-24-28-32-36-40-44-48-52-56-60-64-68-72-76Meet m,n,apex (pole)

Download PDF format printer friendly cutting instructions: [ Download Icon Rose Egg 480a-80 Printer Icon ]

Download the GemCad format design file: [ Download Icon rose_egg_480a-80.gem ]

Rose Egg 480a-80 Cutting Notes

Begin by cutting a 20-sided cylindrical preform. The height of the preformed cylinder must be equal to or greater than 1.3 times its width for you to have enough material when you get to the course 9 and o (pole) facets. When you cut the course 1 facets for the A hemisphere, create a level 'girdle' (equator) line dividing the height of cylinder proportionately, allowing 1.6 times more for the z dimension of the B hemisphere as the A hemisphere.

Transfer when you've finished the A hemisphere, and cut the course a-o sequence on the B hemisphere.

If you cut a Rose Egg 480a-80 of your own, be sure and let me know what you've cut and how you made out.


Index of Gem Designs

Perfect Transfer Index

Table of Contents

Bob Keller