- Resistant: 3 micron gold-plated clasp - Lightweight: 4.8 grams per loop - Anti-allergic: guaranteed Nickel free -Diameter: 4cm Trade secret The assembly is carried out thanks to a transparent thread which makes it possible to weave by hand the pearls and colored crystals between them. Technique, patience and precision are the key words to give birth to this exclusive jewel. Packaging Each jewel is delivered with its velvet pouch and a gift bag.