Serotonin Molecule Necklace – Chemistry Pendant with Birthstone

The serotonin molecule drawn to scale as a chain of hexagons, with a small birthstone set at one end.

Made in 925 sterling silver

Solid 925 sterling silver under every finish. Choose sterling silver as it is, 18K gold plated, or 18K rose gold plated. The stone is cubic zirconia in your chosen birthstone colour.

Why people choose it

The structure is correct

Rings, bonds and side chain are drawn from the actual structural formula rather than approximated. People who know what they are looking at notice immediately.

It says something without saying it

Worn by scientists, students and people who simply like what serotonin stands for. None of them have to explain the choice.

Wider than it is tall

Because the molecule runs horizontally, it sits along the collarbone rather than dropping — an unusual shape among pendants, and easier to layer than it looks.

How to order

• Choose your finish: sterling silver, 18K gold plated or 18K rose gold plated
• Choose the birthstone
• Choose your chain length

Shipping and preparation

Orders are prepared within 1–3 business days and ship free within the United States from our New York fulfillment location. Total estimated time from order to delivery is approximately 3–7 business days.

Caring for it

Keep the piece away from perfume, lotion and cleaning products, and store it in its pouch when you are not wearing it. Wipe gently with a soft dry cloth.

Chain Length Guide

Choose your chain length in the Chain Length option above: 14" to 24" (35–60 cm), all the same price. 18" is our most popular length.

Tip: measure a necklace you already love, or wrap a string around your neck where you want it to sit. Pendant size adds a little extra drop.