Hot Air Balloon

by Arya Akhavan (January 2013)
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Gemology Projectopen
L/W
102%
Design RI
1.76
H/W
74%
Gear
96
V/W³
0.255
Symmetry
8 (mirrored)
Facets
85
Tiers
28
Crown
36
Pavilion
49

I started out trying to make a heart, and ended up with a hot air balloon. This barion may be time-consuming, but if you cut it in rutile, it looks strikingly like a rainbow hot air balloon. Plus, there's all kinds of "dispersion/fire" jokes you can make. Works in materials from orthoclase to rutile (RI = 1.52 - 2.62) with no changes. Suggested length = 12-18 mm

Wireframe

Hot Air Balloon 3D view
Top viewSide viewFront viewBack view

Pavilion

#AngleFacetsNotes
G190.00°
142838586882
Set stone size.
G290.00°
3363
Meet P1, G1 (not a true girdle level!)
G390.00°
2175
Meet P1, G1 (not a true girdle level!)
G490.00°
 690
Meet P1, G1 (not a true girdle level!)
G590.00°
96
Meet P1, G4 (not a true girdle level!)
P669.48°
96
Level girdle.
P567.95°
 690
Level girdle.
P366.73°
3363
Level girdle.
P266.50°
142838586882
Meet P1, G1 (level girdle)
P466.18°
2175
Level girdle.
P144.00°
 3 91521273339455157636975818793
Cut to centerpoint.
P743.00°
12243648607284
Meet P1, P2, P3; P1, P2, P5 (only 4 facets meet)

Crown

#AngleFacetsNotes
C138.93°
96
Set girdle width.
C634.13°
3858
Level girdle.
C229.49°
 690
Level girdle.
C329.49°
14286882
Level girdle.
C429.49°
2175
Level girdle.
C529.49°
3363
Level girdle.
C725.00°
30366066
Meet G1, G2, C3, C5; G1, G2, C5, C6
C825.00°
18247278
Meet G1, G3, C3, C4
C925.00°
1086
Meet G1, G4, C2, C3
C1222.59°
2868
Meet C3, C7, C8; C8, C11
C1321.93°
3363
Meet C5, C7
C1121.24°
1482
Meet C3, C8, C9
C1018.07°
 294
Meet C1, C2
C1516.14°
2472
Meet C8, C11, C12
C1415.51°
4650
Meet C6, C7
T0.00°
24
Meet C9, C10,C11; C7, C13, C14; C12, C13, C15