Louis Vuitton 1 Flower Stud Earring Yellow Gold Blue 3.5g 18k Gold

The piece you’re referring to — Louis Vuitton 1 Flower Stud Earring Yellow Gold Blue with Diamond (18K, ~3.5g) — is essentially part of the Idylle Blossom / Monogram Flower fine jewelry line from Louis Vuitton.

Key details (typical specification for this model family)

• Metal: 18K yellow gold
• Weight: ~3.5g (light single stud)
• Design: Single Monogram Flower / blossom motif
• Color detail: Blue enamel / stone / lacquer accent (varies by exact reference)
• Diamond: 1 small brilliant-cut diamond accent (usually ~0.02–0.04 ct range)
• Type: Single stud earring (sold individually in many LV fine jewelry lines)
• Backing: Secure butterfly or Alpa-style system depending on version