• Based upon the geometry of the RHOMBICTRIACONTAHEDRON
• 30 faces numbered 1-30; the sum of oposing faces = 31

See my New Spring Loaded Dice:
Spring-loaded 30-sided die.
Spring-loaded Icodie.
Spring-loaded die.

The die's faces are supported by springs meeting in its center.
Printed and tested OK.
Copyright ©2011 Ovidiu Opresco

I've coined the word "Geocube" because it is actually a cube projected on a sphere.
See my other Roosevelt Island Tram designs here:
Slice of Big Apple with Roosevelt Island Tram
The New Roosevelt Island Tram Earrings
The New Roosevelt Island Tram Cuff-Links
The New Roosevelt Island Tram / Pendant / Keyring
Pendant / Keyring with Roosevelt Island Tram
Keyring with Roosevelt Island Tram
Soccer Ball with Roosevelt Island Tram inside
Big Apple with Roosevelt Island Tram inside
Ring with Roosevelt Island Tram
Roosevelt Island Möbius Bracelet with Roosevelt Island Tram

I've coined the word "Geocube" because it is actually a cube projected on a sphere.

• Related designs:
Rhombic die
Rhombic die (2.5 cm)
Keyring with Rhombic Die

See my New Spring-Loaded Dice:
Spring-loaded 30-sided die.
Spring-loaded Icodie.
Spring-loaded die.
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• Click on PERSONALIZE to order your size.
Available ring sizes:
US Ring Size 6.5
Inside Diameter: 16.92 mm / 0.666 in
Inside circumference: 53.15 mm / 2.09 in
US Ring Size 7
Inside Diameter: 17.32 mm / 0.682 in
Inside circumference: 54.41 mm / 2.14 in
US Ring Size 8
Inside Diameter: 18.14 mm / 0.714 in
Inside circumference: 56.86 mm / 2.24 in
US Ring Size 9
Inside Diameter: 18.95 mm / 0.746 in
Inside circumference: 59.69 mm / 2.34 in
US Ring Size 10
Inside Diameter: 19.76 mm / 0.778 in
Inside circumference: 62.20 mm / 2.44 in
US Ring Size 11
Inside Diameter: 20.57 mm / 0.81 in
Inside circumference: 64.72 mm / 2.54 in
US Ring Size 12
Inside Diameter: 21.39 mm / 0.842 in
Inside circumference: 67.23 mm / 2.65 in

Shows the duality between the Icosidodecahedron and Rhombictriacontahedron

During the late 70's and early 80' I became highly fascinated by Polyhedra and its Duality.
Intrigued by the little known fact that Plato and Archimedes described their wonderful objects by drawing them with just a stick on the sand, I set up to replicate (well, more or less :-) their extraordinary feat by strictly using only a "T" square, a pair of Compasses, a set of 2 Triangles, and a Ruler.
For the next 5 years I practically lived inside Polyhedra :-) and, what I used to call "The Archimedes' Curse", ended up to be, in fact, "The Archimedes' Blessing"!

The Polyhedral Sculptures depicted below were hand made (from scrap offset plates) and assembled with machine screws from stackable modular pieces. The modules were drawn/designed on a drawing table while strictly using only a "T" square, a pair of Compasses, a set of 2 Triangles, and a Ruler.

POLYHEDRAL SCULPTURES / Scored and folded aluminium offset plates, machine screws & nuts (©1981)

MODULAR POLYHEDRAL LAMP DESIGN (©1981) / Scored and folded aluminium offset plates, machine screws & nuts (©1981)

Based upon wonderful knowledge I accumulated hands-on during the 1980's while exploring "the extraordinary spatial diversity that emanates from the sublime order and elegant simplicity that is exemplified by the subject of polyhedra." (Quote from the Preface to the wonderful book POLYHEDRA PRIMER by Peter Pearce and Susan Pearce)

I was extremely pleased when, a few years back, Prof. George Hart (Department of Computer Science, Department of Computer Science, STONY BROOK UNIVERSITY) included some of my Polyhedral Sculptures, alongside work by Buckminster Fuller and other great designers in his comprehensive COURSE STUDY: COMPUTER SCIENCE AND SCULPTURE (pg. 39-40, OPRESCO).
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See related designs here:
Polyhedral Sculpture #22A
Icosidodecahedron Pendant
Polyhedral Sculpture #22
Polyhedral Sculpture #21
Polyhedral Sculpture #23
Polyhedral Sculpture #21A
Polyhedral Sculpture #23A
Polyhedral Sculpture #23B
Polyhedral Sculpture #24
Polyhedral Sculpture #20
Polyhedral Sculpture #25
Polyhedral Sculpture #20 A
Polyhedral Sculpture #27
Polyhedral Sculpture #28A
Polyhedral Sculpture #29A
Polyhedral Sculpture #29B
Polyhedral Sculpture #28B
Polyhedral Sculpture #30A
Polyhedral Sculpture #30B
Polyhedral Sculpture #30C
Polyhedral Sculpture #30D
Polyhedral Sculpture #31
Desk Toy BALL
Icosidodecahedron Pendant
Dodecahedron - Pendant

Dedicated to Stijn van der Linden.
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"Alea Iacta Est" :-)
For the Dice, Colored Pencils, Markers, Fine Arts Brushes,
Chopsticks, Crayolas — Aficionados, and/or, Collectors Everywhere :-)
The captive intertwined dice could be rotated in the Z axis in any po-
sition relative to each other — while one of the twins appears to float
8 mm above your desk :-)
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Organize your pencils, pens, brushes, chopsticks; long ones,
in the Z axis; shorter ones, in the X & Y axis :-) ----------------------------------------------------------------------------------------------------
This design (with 13 mm square holes) is a variation of
Steel Grid Dice (3 cm) which is my first ever design (2010)
for 3d Printing in Plastics & Stainless Steel at Shapeways.
This design (with 13 mm square holes) is a variation of
Steel Grid Dice (3 cm) which is my first ever design (2010)
for 3d Printing in Plastics & Stainless Steel at Shapeways.
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RELATED DESIGNS:
"Siamese Twins" – Pencil Organizer Dice #2
Pencil Organizer Dice
A (Durer Alphabet) – Pencil Holder
My new Spring Loaded Dice:
Spring-loaded die.
Spring-loaded Icodie.
Spring-loaded 30-sided die.
My other Dice designs:
Dodclock Die (3 cm)
Icodie (3 cm) v.4
Secret Roundie (2.5 cm)
The Rosetta Dice #1 (60)
The Rosetta Dice #2 (60)
Rhombic die (2.5 cm)
Die 30
Rhombic Die #2
32-bit Soccer Ball Die
Kevin's Dice Contraption
Steel Grid Die (2.5 cm)
Exploded Die (Loaded :)
Steel Cage Die #1
Exploded Die (Clean:)
Roundie (2cm)
Roundie (2.5cm)
Steel Grid Die #2 (2.5 cm)
Steel Grid Die #3 (2.5 cm)
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“The only way to discover the limits of the possible
is to go beyond them into the impossible.”
Arthur C. Clarke