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The Golden Ratio Spinner

Was $29.95 NOW $9.95

This ellipsoid’s prolate form elegantly expresses the Golden Ratio (~ 1.618) while illustrating numerous physics concepts when spun. A demonstration of classical mechanics, the ellipsoid is spun horizontally on the included mirrored plate, which provides friction that causes its center of mass to rise until it stands up vertically while continuing to spin. Although made from non-ferrous aluminum, bringing a magnet near it while spinning will slow it down according to Lenz’s law. The ellipsoid generates Lissajous figures when light is reflected off of it as it settles and slows, creating a soothing sound. Just before it stops rotating altogether, it appears to distort as if it were a mercury-like substance—otherwise known as the gelatinous ellipsoid effect.




Lifetime Guarantee

The Golden Ratio Spinner comes with The Hammacher Schlemmer Lifetime Guarantee. Items that we sell are guaranteed for their normal life under standard non-commercial use.

Should any product fail to meet your expectations, we will replace it or refund the cost of the item less shipping and service fees. Returns older than one year will be credited in form of a gift certificate.

Should you have any questions, we are available seven days a week (Monday - Friday 7:30 AM - 9 PM EST and Saturday - Sunday 7:30 AM - 8 PM EST) Please call 1-800-321-1484 to speak with a specialist or email us at to receive a response within 24 hours or less.

Sale item quantities are limited — please order soon.

Item 91148

Additional Shipping Charges Apply

Shipping charges noted in parentheses apply in addition to our standard shipping & service charges on this item.

Special Shipping Charges

Shipped via truck and may require customer assistance upon delivery. You will be contacted to make an appointment for delivery.

We're sorry, but gift wrap and gift cards are not available.

Canada Duty Free

This product is Duty Free to Canada

GST still applies and will be charged upon processing.

Price $9.95
We regret that this item is no longer available.

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Golden Ratio Spinner
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Golden Ratio Spinner
Golden Ratio Spinner
Golden Ratio Spinner