Greece Letter Pi Sign Infinity Charm Bracelet Back to School Gift (necklace)

• Material: High quality stainless steel pi charm, rhinestone alloy infinity charm,. It's lead free and nickel free,hypoallergenic, it doesn’t rust, change color or tarnish.
• Size: chain length 18 inch with 2 inch extension.Stainless steel wire bangle diameter 60mm and it is adjustable, fit most people's wrist(accommodates wrist sizes 6"-8").
• This necklace/bracelet features a infinity and a Pi charm - and makes a great graduation gift for a mathematician or scientist.
• The irrational number Pi is a mathematical constant, the ratio of a circle's circumference to its diameter, approximately 3.14. It has been represented by the Greek letter since the mid-18th century.
• The symbolism comes from the first letter of the word region ( Περιφέρεια - Periferia in Greek, Π - Pi) and has established itself internationally. In the Latin alphabet is represented as Pi when Greek characters are not available. Pi is also known as Archimedes constant.

Description Pi necklace bracelet. Science jewelry. The mathematical constant Pi is a real number and can be defined as the ratio length of the circumference of a circle to its diameter in Euclidean geometry, and is used very often in mathematics, physics and engineering.