The Arkenstone of Thrain

by Arya Akhavan (December 2015)
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Gemology Projectopen
L/W
100%
Design RI
2.16
H/W
74%
Gear
80
V/W³
0.254
Symmetry
20 (mirrored)
Facets
1001
Tiers
29
Crown
401
Pavilion
600

So...I may have been overly literal when doing this recreation from The Lord of the Rings. The Arkenstone of Thrain was a "globe with a thousand facets", per Thorin Oakenshield, so I went with a round with 1,000 facets. Heh. P16 is optional in "smaller" stones and really only should be added in in absurdly large stones. This design should only be cut in CZ, with a MINIMUM size of about 30mm. It's a showpiece stone.

Wireframe

The Arkenstone of Thrain 3D view
Top viewSide viewFront viewBack view

Pavilion

#AngleFacetsNotes
G190.00°
80 2 4 6 81012141618202224262830323436384042444648505254565860626466687072747678
Set stone size.
P150.01°
80 2 4 6 81012141618202224262830323436384042444648505254565860626466687072747678
Cut to centerpoint.
P248.63°
 1 3 5 7 91113151719212325272931333537394143454749515355575961636567697173757779
Meet P1, G1
P348.51°
 1 3 5 7 91113151719212325272931333537394143454749515355575961636567697173757779
Meet P1, P2
P447.41°
80 2 4 6 81012141618202224262830323436384042444648505254565860626466687072747678
Meet P1, P2, P3
P547.30°
80 2 4 6 81012141618202224262830323436384042444648505254565860626466687072747678
Meet P3, P4
P646.36°
 1 3 5 7 91113151719212325272931333537394143454749515355575961636567697173757779
Meet P3, P4, P5
P746.19°
 1 3 5 7 91113151719212325272931333537394143454749515355575961636567697173757779
Meet P5, P6
P845.36°
80 2 4 6 81012141618202224262830323436384042444648505254565860626466687072747678
Meet P5, P6, P7
P945.09°
80 2 4 6 81012141618202224262830323436384042444648505254565860626466687072747678
Meet P7, P8
P1044.49°
 1 3 5 7 91113151719212325272931333537394143454749515355575961636567697173757779
Meet P7, P8, P9
P1144.39°
 1 3 5 7 91113151719212325272931333537394143454749515355575961636567697173757779
Meet P9, P10
P1243.99°
80 4 81216202428323640444852566064687276
P1243.63°
80 4 81216202428323640444852566064687276
Meet P9, P10, P11
P1343.49°
80 4 81216202428323640444852566064687276
Meet P11, P12
P1442.58°
 2 6101418222630343842465054586266707478
Meet P11, P12, P13
P1541.99°
 2 6101418222630343842465054586266707478
Meet P13, P14
P1641.00°
80 4 81216202428323640444852566064687276
Meet P13, P14, P15 (optional)

Crown

#AngleFacetsNotes
C145.00°
80 2 4 6 81012141618202224262830323436384042444648505254565860626466687072747678
Set girdle width.
C243.68°
 1 3 5 7 91113151719212325272931333537394143454749515355575961636567697173757779
Meet G1, C1
C338.04°
 1 3 5 7 91113151719212325272931333537394143454749515355575961636567697173757779
Meet C1, C2
C436.97°
80 2 4 6 81012141618202224262830323436384042444648505254565860626466687072747678
Meet C1, C2, C3
C533.25°
80 2 4 6 81012141618202224262830323436384042444648505254565860626466687072747678
Meet C3, C4
C632.34°
 1 3 5 7 91113151719212325272931333537394143454749515355575961636567697173757779
Meet C3, C4, C5
C727.67°
 1 3 5 7 91113151719212325272931333537394143454749515355575961636567697173757779
Meet C5, C6
C827.04°
80 2 4 6 81012141618202224262830323436384042444648505254565860626466687072747678
Meet C5, C6 C7
C921.37°
80 2 4 6 81012141618202224262830323436384042444648505254565860626466687072747678
Meet C7, C8
C1020.94°
 1 3 5 7 91113151719212325272931333537394143454749515355575961636567697173757779
Meet C7, C8, C9
T0.00°
20
Meet C9, C10