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Pentacle by Paul A. Head

Pentacle - Designed by Paul A. Head headbnk@azstarnet.com ©1995
Angles for R.I. = 1.54	41 facets + 5 facets on girdle = 46
1-fold, mirror image symmetry	96 index
Note: The girdle facets are not equal.
L/W = 1.042 T/W = 0.460 T/L = 0.442 P/W = 43.0% C/W = 14.6%	H/W = (P+C)/W+0.02 = 0.600 P/H = 0.+670 C/H = 0.300
Vol./W^3 = 0.192	Brightness at 0 degrees tilt for quartz ISO = 93.0%

Pavilion
P1	42.6	01-18-20-37-59-76-78-95	Cut to temporary center point.
G1	90.0	96-19-38-58-77	Establish stone width.
P2	46.0	96-19-38-58-77	Meet P1, P1, G1 for level girdle.
P3	42.0	96-19-38-58-77	Meet P1, P1, P2 at break point.
P4	42.4	39-57	Meet G1, G1, P2.
Crown
C1	34.0	96-19-77	Cut level girdle.
C2	33.7	38-58	Complete girdle.
C3	29.5	01-18-20-76-78-95	Meet G1, G1, C1 at girdle.
C4	29.4	37-59	Meet G1, G1, C2 at girdle.
C5	29.3	39-57	Meet G1, G1, C2 at girdle.
C6	27.8	96-19-77	Meet C1, C3, C3 at break point.
C7	27.5	38-58	Meet C2, C4, C5 at break point.
TABLE	0.00	ANY	Meet C3, C3, C6.

GemCad users can download a zipped .gem design file for Pentacle: pentacle.zip.

R.I. = 1.62  : C.A. = 38.1 TOPAZ ISO Brigtness = 93.2%				R.I. = 1.76  : C.A. = 34.6 CORUNDUM ISO Brigtness = 94.1%				R.I. = 2.15  : C.A. = 27.7 CUBIC ZIRCONIUM ISO Brigtness = 93.2%
P1	42.6	C1	39.0	P1	41.6	C1	36.0	P1	41.1	C1	34.0
G1	90.0	C2	38.6	G1	90.0	C2	35.6	G1	90.0	C2	33.7
P2	46.0	C3	34.2	P2	45.0	C3	31.4	P2	44.5	C3	29.5
P3	42.0	C4	34.0	P3	41.0	C4	31.2	P3	40.5	C4	29.4
P4	42.4	C5	33.9	P4	41.4	C5	31.1	P4	40.9	C5	29.3
%Z	43.0	C6	32.4	%Z	41.5	C6	29.6	%Z	40.8	C6	27.8
		C7	32.0			C7	29.3			C7	27.5
		%Z	17.5			%Z	15.7			%Z	14.6

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