Tessellation 13 (F)

"Be Silent, O Sufferer of Steatopygia Gravis"

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L/W: 141%
Design RI: 1.58
H/W: 87%
Gear: 96
V/W³: 0.449
Symmetry: 4 (mirrored)
Facets: 69
Tiers: 18
Crown: 29
Pavilion: 28

Suite: Tessellation Party! by Arya Akhavan (October 2012)

This semi-rectangular F-type is a bit odd. One would expect it to have a keel running along the long axis, but instead, the keel runs along the short axis! Take THAT, classic gemstone design! Also has a sweet reflection pattern, and works in any material from feldspar to rutile (RI = 1.52 - 2.62) with no changes. Suggested length = 6-12 mm

Wireframe

Pavilion

#	Angle	Facets	Notes
G1	90.00°	1474995	Set stone size.
G2	90.00°	15336381	Establish girdle level.
G3	90.00°	19296777	Level girdle.
P4	66.01°	1474995	Level girdle.
P3	43.34°	19296777	Meet at culet.
P2	43.24°	15336381	Meet at culet.
P1	43.20°	10385886	Cut to centerpoint.
P6	42.69°	17316579	Meet P2, P3, G2, G3; culet
P5	42.50°	12366084	Meet P2, G1, G2, P4
P7	42.42°	20286876	Meet P3, G3; culet

Crown

#	Angle	Facets	Notes
C1	55.53°	1474995	Set girdle width.
C3	32.47°	19296777	Level girdle.
C2	30.48°	15336381	Level girdle.
C4	25.63°	20286876	Meet G3, C3
C5	23.15°	18306678	Meet C2, C3, C4
C6	20.21°	4445292	Meet C1, C2, C5
C7	16.73°	96244872	Meet C1, C6
T	0.00°	24	Meet C5, C6, C7