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Pi necklace | sterling silver
There is no other number that has its own annual celebration. Pi Day, March 14, organised worldwide by mathematicians and the kind of people who think about ratios at the margin. Pi is 3.14159 and continuing without pattern, the most universally recognised mathematical constant in the world. Written here as a 14 mm pendant in 925 sterling silver.
The Science Behind Pi
Pi has been approximated since ancient Babylon around 1900 BC and ancient Egypt around 1650 BC. Archimedes of Syracuse gave the first rigorous bounds in roughly 250 BC, using polygons with 96 sides inscribed and circumscribed around a circle. The symbol π was introduced by Welsh mathematician William Jones in 1706 and popularised by Leonhard Euler. Johann Heinrich Lambert proved pi irrational in 1761. Ferdinand von Lindemann proved it transcendental in 1882, which also proved that squaring the circle by compass and straightedge is impossible. Pi appears in Euler's identity, in Gaussian integrals, in Heisenberg's uncertainty principle, and in the volume formula for spheres of any dimension.
Who Tends to Wear This
- mathematicians and mathematics educators
- physicists, statisticians, and engineers
- students entering or completing a mathematics or physics degree
- anyone who celebrates Pi Day and means it
About a third of orders ship to working mathematicians or physics-and-engineering professionals. The rest are gifts to students entering the field or to teachers who marked someone's first encounter with the constant.
Explore Related Math and Physics Jewelry
- Pi necklace | gold vermeil
- Phi necklace | silver
- Golden ratio necklace | silver
- Integral necklace | silver
- E=mc² necklace | silver
FAQ
Is pi too obvious a gift for someone in mathematics?
Working mathematicians tend to find it the opposite. The more central a constant is to someone's daily work, the more likely they are to wear it without irony. Engineers and physicists react the same way. The audience for whom this is decoration is smaller than the audience for whom it is a reference to a working life spent on the mathematical sciences.
Why is pi transcendental and what does that mean?
Transcendental means pi is not the root of any polynomial equation with rational coefficients. It is a stronger statement than irrational, which only says pi cannot be written as a ratio of integers. Lindemann's 1882 proof of pi's transcendence settled the ancient question of whether a circle can be squared with compass and straightedge: it cannot, because the construction would require pi to be the root of a finite polynomial, which it is not.
What size is the pendant and what is the return policy?
925 sterling silver, 14 mm pendant on a 45 cm sterling silver chain with a 5 cm extender. Smaller scale than most pieces in the catalogue, sits as a quiet daily-wear pendant rather than a statement piece. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.
Is there a gold version?
Yes. The same 14 mm pi pendant is available in 18K gold vermeil at the same chain length. Same symbol, different metal.
Math & Physics
Unlock the elegance of the abstract with our math and physics-inspired jewelry collection. These carefully crafted pieces mirror the profound equations and natural laws that shape our understanding of the universe. Experience the allure of fractals, the rhythmic beauty of pi, and the celestial wonder of astral formations—each piece serves as a wearable homage to the artistry inherent in scientific inquiry.
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