DNA Double Helix Necklace - Silver Tone science teacher baby gift The earrings measure 1" from

The earrings measure 1" from the bottom of the ear wire

For more of our science-themed jewelry

The loop closure is an extra wide 10mm ring for easier closure

It comes from a smoke & pet-free workspace and home

The pendant measures 1

DNA Double Helix Necklace - Silver Tone science teacher baby gift The earrings measure 1" fromA unique, DNA Double Helix Necklace in an adjustable length, nickel free, silver toned alloy. Celebrate the "stuff of life" with a DNA Necklace. This simple, striking design makes for a stunning necklace statement! The Details: The pendant measures 1. 5" long (4cm) and 1cm wide The lightweight chain measures 18" long The lobster claw clasp features an extra wide 10mm loop for easy closure I have added a 2" length extender with a spiral charm